diff --git a/handbook/survey/drawup.htm b/handbook/survey/drawup.htm
index fa613332e..9855d4da3 100644
--- a/handbook/survey/drawup.htm
+++ b/handbook/survey/drawup.htm
@@ -27,6 +27,10 @@ draw only what was recorded faithfully in the cave. If this makes your
 drawing look bad - record more next time! If things really are unclear,
 consider taking a copy of this drawing back into the cave to clarify it.</p>
 
+<p>Drawing a cave is not easy but anyone can learn to do it. 
+Read the brief <a href="XI-2-11.pdf">Cave Mapping - Sketching the Detail"</a> 
+5-page llustrated guide by Ken Grimes which makes everything clear.
+
 <p>Make sure the drawing clearly shows the point of connection to previous
 surveys (look at the relevant drawing in the old survey book to ensure the
 sketches match and you really have connected where you think). Make sure you