diff --git a/base/newserial/README b/base/newserial/README
index 60cf24f9..739550ed 100644
--- a/base/newserial/README
+++ b/base/newserial/README
@@ -98,6 +98,8 @@ Design principles for this directory.
      AND IT'S DONE! Nothing else in the library requires the explicit
      knowledge of type of  MOLD. 
 
+     User exercise: start by adding CSR in this way. 
+     (waiting for a couple of bug fixes from NAG to actually test this.)