diff --git a/src/cli.rs b/src/cli.rs
index 10b4e36..d1d9005 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -7,20 +7,19 @@ use codespan_reporting::files::SimpleFile;
 use directories::ProjectDirs;
 use structopt::StructOpt;
 
-use crate::error;
-// use crate::eval::{DateRange, Entry, EntryMode, SourceInfo};
+use crate::eval::{DateRange, Entry, EntryMode};
 use crate::files::arguments::Range;
-use crate::files::{self, Files};
+use crate::files::{self, FileSource, Files};
 
-// use self::error::Result;
-// use self::layout::line::LineLayout;
+use self::error::Error;
+use self::layout::line::LineLayout;
 
-// mod cancel;
-// mod done;
-// mod error;
-// mod layout;
-// mod print;
-// mod show;
+mod cancel;
+mod done;
+mod error;
+mod layout;
+mod print;
+mod show;
 
 #[derive(Debug, StructOpt)]
 pub struct Opt {
@@ -83,9 +82,7 @@ fn find_now(opt: &Opt, files: &Files) -> NaiveDateTime {
     }
 }
 
-/*
-
-fn find_entries(files: &Files, range: DateRange) -> Result<Vec<Entry>> {
+fn find_entries(files: &Files, range: DateRange) -> Result<Vec<Entry>, Error<FileSource>> {
     Ok(files.eval(EntryMode::Relevant, range)?)
 }
 
@@ -98,7 +95,12 @@ fn find_layout(
     layout::layout(files, entries, range, now)
 }
 
-fn run_command(opt: &Opt, files: &mut Files, range: DateRange, now: NaiveDateTime) -> Result<()> {
+fn run_command(
+    opt: &Opt,
+    files: &mut Files,
+    range: DateRange,
+    now: NaiveDateTime,
+) -> Result<(), Error<FileSource>> {
     match &opt.command {
         None => {
             let entries = find_entries(files, range)?;
@@ -131,14 +133,12 @@ fn run_command(opt: &Opt, files: &mut Files, range: DateRange, now: NaiveDateTim
     Ok(())
 }
 
-*/
-
 pub fn run() {
     let opt = Opt::from_args();
 
     let mut files = Files::new();
     if let Err(e) = load_files(&opt, &mut files) {
-        error::eprint_error(&files, &e);
+        crate::error::eprint_error(&files, &e);
         process::exit(1);
     }
 
@@ -151,7 +151,7 @@ pub fn run() {
             Err(e) => {
                 eprintln!("Failed to evaluate --range:");
                 let file = SimpleFile::new("--range", &opt.range);
-                error::eprint_error(&file, &e);
+                crate::error::eprint_error(&file, &e);
                 process::exit(1)
             }
         },
@@ -161,17 +161,13 @@ pub fn run() {
         }
     };
 
-    /*
-
     if let Err(e) = run_command(&opt, &mut files, range, now) {
-        e.print(&files.sources());
+        crate::error::eprint_error(&files, &e);
         process::exit(1);
     }
 
-    */
-
     if let Err(e) = files.save() {
-        error::eprint_error(&files, &e);
+        crate::error::eprint_error(&files, &e);
         process::exit(1);
     }
 }
diff --git a/src/cli/cancel.rs b/src/cli/cancel.rs
index 62cc8ea..4821676 100644
--- a/src/cli/cancel.rs
+++ b/src/cli/cancel.rs
@@ -6,16 +6,16 @@ use crate::eval::Entry;
 use crate::files::commands::{Done, DoneKind};
 use crate::files::Files;
 
-use super::error::{Error, Result};
+use super::error::Error;
 use super::layout::line::LineLayout;
 
-pub fn cancel(
+pub fn cancel<S>(
     files: &mut Files,
     entries: &[Entry],
     layout: &LineLayout,
     numbers: &[usize],
     now: NaiveDateTime,
-) -> Result<()> {
+) -> Result<(), Error<S>> {
     let mut not_tasks = vec![];
     for &number in numbers {
         let entry = &entries[layout.look_up_number(number)?];
diff --git a/src/cli/done.rs b/src/cli/done.rs
index 1d3d809..d68ad38 100644
--- a/src/cli/done.rs
+++ b/src/cli/done.rs
@@ -6,16 +6,16 @@ use crate::eval::Entry;
 use crate::files::commands::{Done, DoneKind};
 use crate::files::Files;
 
-use super::error::{Error, Result};
+use super::error::Error;
 use super::layout::line::LineLayout;
 
-pub fn done(
+pub fn done<S>(
     files: &mut Files,
     entries: &[Entry],
     layout: &LineLayout,
     numbers: &[usize],
     now: NaiveDateTime,
-) -> Result<()> {
+) -> Result<(), Error<S>> {
     let mut not_tasks = vec![];
     for &number in numbers {
         let entry = &entries[layout.look_up_number(number)?];
diff --git a/src/cli/error.rs b/src/cli/error.rs
index 3bf054e..725b2e3 100644
--- a/src/cli/error.rs
+++ b/src/cli/error.rs
@@ -1,21 +1,25 @@
 use std::result;
 
-use crate::eval::{self, SourceInfo};
+use codespan_reporting::files::Files;
+use codespan_reporting::term::Config;
+
+use crate::error::Eprint;
+use crate::eval;
 
 #[derive(Debug, thiserror::Error)]
-pub enum Error {
+pub enum Error<S> {
     #[error("{0}")]
-    Eval(#[from] eval::Error),
+    Eval(#[from] eval::Error<S>),
     #[error("No entry with number {0}")]
     NoSuchEntry(usize),
     #[error("Not a task")]
     NotATask(Vec<usize>),
 }
 
-impl Error {
-    pub fn print<'a>(&self, sources: &[SourceInfo<'a>]) {
+impl<'a, F: Files<'a>> Eprint<'a, F> for Error<F::FileId> {
+    fn eprint<'f: 'a>(&self, files: &'f F, config: &Config) {
         match self {
-            Error::Eval(e) => e.print(sources),
+            Error::Eval(e) => e.eprint(files, config),
             Error::NoSuchEntry(n) => eprintln!("No entry with number {}", n),
             Error::NotATask(ns) => {
                 if ns.is_empty() {
@@ -30,5 +34,3 @@ impl Error {
         }
     }
 }
-
-pub type Result<T> = result::Result<T, Error>;
diff --git a/src/cli/layout/day.rs b/src/cli/layout/day.rs
index 30db056..f3866a3 100644
--- a/src/cli/layout/day.rs
+++ b/src/cli/layout/day.rs
@@ -8,7 +8,6 @@ use std::collections::HashMap;
 use chrono::{NaiveDate, NaiveDateTime};
 
 use crate::eval::{DateRange, Dates, Entry, EntryKind};
-use crate::files::commands::Command;
 use crate::files::primitives::Time;
 use crate::files::Files;
 
@@ -51,15 +50,10 @@ impl DayLayout {
     pub fn layout(&mut self, files: &Files, entries: &[Entry]) {
         self.insert(self.today, DayEntry::Now(self.time));
 
-        let mut commands = entries
-            .iter()
-            .enumerate()
-            .map(|(i, e)| (i, e, files.command(e.source)))
-            .collect::<Vec<_>>();
+        let mut entries = entries.iter().enumerate().collect::<Vec<_>>();
+        Self::sort_entries(&mut entries);
 
-        Self::sort_entries(&mut commands);
-
-        for (index, entry, _) in commands {
+        for (index, entry) in entries {
             self.layout_entry(index, entry);
         }
 
@@ -196,7 +190,7 @@ impl DayLayout {
         }
     }
 
-    fn sort_entries(entries: &mut Vec<(usize, &Entry, &Command)>) {
+    fn sort_entries(entries: &mut Vec<(usize, &Entry)>) {
         // Entries should be sorted by these factors, in descending order of
         // significance:
         // 1. Their start date, if any
@@ -205,10 +199,10 @@ impl DayLayout {
         // 4. Their title
 
         // 4.
-        entries.sort_by_key(|(_, _, c)| c.title());
+        entries.sort_by_key(|(_, e)| &e.title);
 
         // 3.
-        entries.sort_by_key(|(_, e, _)| match e.kind {
+        entries.sort_by_key(|(_, e)| match e.kind {
             EntryKind::Task => 0,
             EntryKind::TaskDone(_) | EntryKind::TaskCanceled(_) => 1,
             EntryKind::Birthday(_) => 2,
@@ -216,14 +210,14 @@ impl DayLayout {
         });
 
         // 2.
-        entries.sort_by(|(_, e1, _), (_, e2, _)| {
+        entries.sort_by(|(_, e1), (_, e2)| {
             let d1 = e1.dates.map(|d| d.sorted().other_with_time());
             let d2 = e2.dates.map(|d| d.sorted().other_with_time());
             d2.cmp(&d1) // Inverse comparison
         });
 
         // 1.
-        entries.sort_by_key(|(_, e, _)| e.dates.map(|d| d.sorted().root_with_time()));
+        entries.sort_by_key(|(_, e)| e.dates.map(|d| d.sorted().root_with_time()));
     }
 
     fn sort_day(day: &mut Vec<DayEntry>) {
diff --git a/src/cli/layout/line.rs b/src/cli/layout/line.rs
index 637d963..78bbabc 100644
--- a/src/cli/layout/line.rs
+++ b/src/cli/layout/line.rs
@@ -11,7 +11,7 @@ use crate::eval::{Entry, EntryKind};
 use crate::files::primitives::Time;
 use crate::files::Files;
 
-use super::super::error::{Error, Result};
+use super::super::error::Error;
 use super::day::{DayEntry, DayLayout};
 
 #[derive(Debug, Clone, Copy)]
@@ -145,7 +145,7 @@ impl LineLayout {
         &self.lines
     }
 
-    pub fn look_up_number(&self, number: usize) -> Result<usize> {
+    pub fn look_up_number<S>(&self, number: usize) -> Result<usize, Error<S>> {
         self.numbers
             .iter()
             .filter(|(_, n)| **n == number)
@@ -253,10 +253,10 @@ impl LineLayout {
     }
 
     fn entry_title(files: &Files, entry: &Entry) -> String {
-        let command = files.command(entry.source);
+        let command = files.command(entry.source).command;
         match entry.kind {
-            EntryKind::Birthday(Some(age)) => format!("{} ({})", command.title(), age),
-            _ => command.title().to_string(),
+            EntryKind::Birthday(Some(age)) => format!("{} ({})", entry.title, age),
+            _ => entry.title.clone(),
         }
     }
 
diff --git a/src/cli/show.rs b/src/cli/show.rs
index 81cac22..1b433eb 100644
--- a/src/cli/show.rs
+++ b/src/cli/show.rs
@@ -1,32 +1,18 @@
 use crate::eval::{Entry, EntryKind};
 use crate::files::Files;
 
-use super::error::Result;
+use super::error::Error;
 use super::layout::line::LineLayout;
 
 fn show_entry(files: &Files, entry: &Entry) {
     let command = files.command(entry.source);
 
-    match entry.kind {
-        EntryKind::Task => println!("TASK {}", command.title()),
-        EntryKind::TaskDone(when) => {
-            println!("DONE {}", command.title());
-            println!("DONE AT {}", when);
-        }
-        EntryKind::TaskCanceled(when) => {
-            println!("CANCELED {}", command.title());
-            println!("CANCELED AT {}", when);
-        }
-        EntryKind::Note => println!("NOTE {}", command.title()),
-        EntryKind::Birthday(Some(age)) => {
-            println!("BIRTHDAY {}", command.title());
-            println!("AGE {}", age);
-        }
-        EntryKind::Birthday(None) => {
-            println!("BIRTHDAY {}", command.title());
-            println!("AGE UNKNOWN");
-        }
-    }
+    let kind = match entry.kind {
+        EntryKind::Task | EntryKind::TaskDone(_) | EntryKind::TaskCanceled(_) => "TASK",
+        EntryKind::Note => "NOTE",
+        EntryKind::Birthday(_) => "BIRTHDAY",
+    };
+    println!("{} {}", kind, entry.title);
 
     if let Some(dates) = entry.dates {
         println!("DATE {}", dates.sorted());
@@ -34,17 +20,25 @@ fn show_entry(files: &Files, entry: &Entry) {
         println!("NO DATE");
     }
 
-    for line in command.desc() {
-        println!("# {}", line);
+    match entry.kind {
+        EntryKind::TaskDone(when) => println!("DONE {}", when),
+        EntryKind::TaskCanceled(when) => println!("CANCELED {}", when),
+        EntryKind::Birthday(Some(age)) => println!("AGE {}", age),
+        _ => {}
+    }
+
+    println!("FROM COMMAND");
+    for line in format!("{}", command.command).lines() {
+        println!("| {}", line);
     }
 }
 
-pub fn show(
+pub fn show<S>(
     files: &Files,
     entries: &[Entry],
     layout: &LineLayout,
     numbers: &[usize],
-) -> Result<()> {
+) -> Result<(), Error<S>> {
     if numbers.is_empty() {
         // Nothing to do
         return Ok(());
@@ -53,7 +47,7 @@ pub fn show(
     let indices = numbers
         .iter()
         .map(|n| layout.look_up_number(*n))
-        .collect::<Result<Vec<usize>>>()?;
+        .collect::<Result<Vec<usize>, _>>()?;
 
     show_entry(files, &entries[indices[0]]);
     for &index in indices.iter().skip(1) {
diff --git a/src/eval/command.rs b/src/eval/command.rs
index e50e580..0bec665 100644
--- a/src/eval/command.rs
+++ b/src/eval/command.rs
@@ -45,6 +45,20 @@ impl<'a> EvalCommand<'a> {
         }
     }
 
+    fn title(&self) -> String {
+        match self {
+            Self::Task(task) => task.title.clone(),
+            Self::Note(note) => note.title.clone(),
+        }
+    }
+
+    fn has_description(&self) -> bool {
+        match self {
+            Self::Task(task) => !task.desc.is_empty(),
+            Self::Note(note) => !note.desc.is_empty(),
+        }
+    }
+
     /// Last root date mentioned in any `DONE`.
     fn last_done_root(&self) -> Option<NaiveDate> {
         match self {
@@ -172,7 +186,14 @@ impl<'a> CommandState<'a> {
             None
         };
 
-        Ok(Entry::new(self.source, kind, dates, remind))
+        Ok(Entry::new(
+            self.source,
+            kind,
+            self.command.title(),
+            self.command.has_description(),
+            dates,
+            remind,
+        ))
     }
 
     /// Add an entry, respecting [`Self::from`] and [`Self::until`]. Does not
diff --git a/src/eval/entry.rs b/src/eval/entry.rs
index 09d51a0..f0f1e74 100644
--- a/src/eval/entry.rs
+++ b/src/eval/entry.rs
@@ -15,10 +15,12 @@ pub enum EntryKind {
 }
 
 /// A single instance of a command.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone)]
 pub struct Entry {
     pub source: Source,
     pub kind: EntryKind,
+    pub title: String,
+    pub has_description: bool,
     pub dates: Option<Dates>,
     /// Remind the user of an entry before it occurs. This date should always be
     /// before the entry's start date, or `None` if there is no start date.
@@ -29,6 +31,8 @@ impl Entry {
     pub fn new(
         source: Source,
         kind: EntryKind,
+        title: String,
+        has_description: bool,
         dates: Option<Dates>,
         remind: Option<NaiveDate>,
     ) -> Self {
@@ -43,6 +47,8 @@ impl Entry {
         Self {
             source,
             kind,
+            title,
+            has_description,
             dates,
             remind,
         }
diff --git a/src/files.rs b/src/files.rs
index 3ba0573..484c76b 100644
--- a/src/files.rs
+++ b/src/files.rs
@@ -7,7 +7,7 @@ use chrono::{DateTime, NaiveDate, Utc};
 use codespan_reporting::files::SimpleFiles;
 use tzfile::Tz;
 
-use self::commands::{Command, File};
+use self::commands::{Command, Done, File};
 pub use self::error::{Error, Result};
 use self::primitives::Spanned;
 
@@ -337,7 +337,6 @@ impl Files {
         }
     }
 
-    /*
     /// Add a [`Done`] statement to the task identified by `source`.
     ///
     /// Returns whether the addition was successful. It can fail if the entry
@@ -347,12 +346,11 @@ impl Files {
         let file = &mut self.files[source.file];
         match &mut file.file.commands[source.command] {
             Command::Task(t) => t.done.push(done),
-            Command::Note(_) => return false,
+            _ => return false,
         }
         file.dirty = true;
         true
     }
-    */
 
     /* Errors */