diff --git a/handbook/troggle/training/trogbegin.html b/handbook/troggle/training/trogbegin.html
index cc233f72c..464d8fc4b 100644
--- a/handbook/troggle/training/trogbegin.html
+++ b/handbook/troggle/training/trogbegin.html
@@ -21,7 +21,7 @@
 <a href="../trogusers.html">Who needs to know What and When</a> (top half of the page only)<br>
 
 <h3>Stage I - Basics - The 3 sources of Truth</h3>
-<p>There are THREE (3) basic sources of data that troggle manages.
+<p>There are THREE (3) basic sources of data that troggle manages:<b>trips</b>, <b>surveys</b>, <b>raw data</b>:
 <ol>
 <li>Open the page <a href="https://expo.survex.com/expedition/2023">Expo 2023</a> in a new tab in your browser (SLOW on first access).
 <li>Scroll down to the second table with 4 columns with headings "Date", Logged trips.." etc.
@@ -44,7 +44,7 @@
 </figure>
 <li>If you don't yet understand how expo uses any of the words above, click on the handbook links above and read the explanations.
 <li>If you are completely puzzled, read the <a href="/handbook/intro.htm">Expo introduction</a> 
-and <a href="/handbook/survey/index.htm">Cave surveying and data management</a>
+  or <a href="/handbook/survey/index.htm">Cave surveying and data management</a> or <a href="/handbook/survey/why.htm">Why am I doing this?</a>
 <br>