diff --git a/PC/src/readme.txt b/PC/src/readme.txt
new file mode 100644
index 0000000..4685b90
--- /dev/null
+++ b/PC/src/readme.txt
@@ -0,0 +1,3 @@
+This directory is used only for VC++ version 1.5 Python source files.
+The "makesrc.exe" program copies the sources here with shortened
+names.  See ../readme.txt.