diff --git a/2004/gavin/.gitignore b/2004/gavin/.gitignore
index 3b272d8b3..9d56fadf5 100644
--- a/2004/gavin/.gitignore
+++ b/2004/gavin/.gitignore
@@ -3,3 +3,6 @@ sh
 vi
 gavin.o
 fs/
+img/README.md
+img/gavin.c
+img/prim
diff --git a/2004/gavin/README.md b/2004/gavin/README.md
index d5ead237c..f86f14918 100644
--- a/2004/gavin/README.md
+++ b/2004/gavin/README.md
@@ -66,7 +66,8 @@ Press and hold any key.
 
 [Yusuke Endoh](/winners.html#Yusuke_Endoh)  provided the `kernel` and `fs.tar`
 files which can be used if you cannot normally use this entry. Instead of
-generating the files just use the files provided.
+generating the files just use the files provided, found under the [img/](img/)
+directory.
 
 Thank you Yusuke!
 
diff --git a/2004/gavin/fs.tar b/2004/gavin/img/fs.tar
similarity index 88%
rename from 2004/gavin/fs.tar
rename to 2004/gavin/img/fs.tar
index 35a03f8bf..d33283880 100644
Binary files a/2004/gavin/fs.tar and b/2004/gavin/img/fs.tar differ
diff --git a/2004/gavin/kernel b/2004/gavin/img/kernel
similarity index 100%
rename from 2004/gavin/kernel
rename to 2004/gavin/img/kernel
diff --git a/todo.md b/todo.md
index 7088a9ac5..879afdd2f 100644
--- a/todo.md
+++ b/todo.md
@@ -1,5 +1,5 @@
 # A todo list of known things to check and/or do
-*Last updated: Wed  3 May 2023 14:57:29 UTC*
+*Last updated: Fri 19 May 2023 09:39:17 UTC*
 
 More things will likely be added over time and as items are done they _should
 be_ removed from the list IF AND ONLY IF (!!) we are certain it is done (many
@@ -55,3 +55,12 @@ only the years through 1986 are done. This should not take much time but I
 This will likely not be updated until after it's done (and when I remember to
 remove it - I expect that when I go for it I'll do it in one sitting or maybe a
 few sittings with a few brief breaks).
+
+- Verify that [2004/gavin](2004/gavin/)'s [img/fs.tar](2004/gavin/img/fs.tar)
+contains the same version of files as under [2004/gavin](2004/gavin/) itself.
+This should be verifiable by extracting the tarball in the entry's [img/](img/)
+subdirectory and then typing the below from the entry's main directory
+([2004/gavin](2004/gavin)), making sure no output is displayed:
+
+	diff -r . img/fs|grep -v 'Only in'
+