--- a/README
+++ b/README
@@ -22,6 +22,9 @@ forgot to add to the repository. If you 
 files that this program would delete use:
   hg purge -vn
 
+"hg purge" was inspired by the "cvspurge" script contained in CVS utilities
+(http://www.red-bean.com/cvsutils/).
+
 
 How to install
 ==============