diff --git a/handbook/troggle/trogdjango.html b/handbook/troggle/trogdjango.html
index 321bec2e9..a14eddce5 100644
--- a/handbook/troggle/trogdjango.html
+++ b/handbook/troggle/trogdjango.html
@@ -22,7 +22,7 @@
     <li><var>Cave.objects.all()</var>
     <li><var>Cave.caveandentrance_set.all</var>
 </ul>
-note that the suffix on a name '<a href="https://docs.djangoproject.com/en/dev/topics/db/queries/#backwards-related-objects"><var>_set</var></a>' actually denotes a function call to the database to find all  objects of class "CaveAndEntrance" which are foreign-keyed on that object "Cave". Don't let this upset you. Yes, at a deeper level there is SQL happening. (The underline character and lower-casing usually denotes a dereferencing operation in Django queries, but in this case it is a 
+  note that the suffix on a name '<a href="https://docs.djangoproject.com/en/dev/topics/db/queries/#backwards-related-objects"><var>_set</var></a>' actually denotes a function call to the database to find all  objects of class "CaveAndEntrance" <a href="https://dnmtechs.com/understanding-the-_set-attribute-in-django-querysets/">which are foreign-keyed</a> on that object "Cave". Don't let this upset you. Yes, at a deeper level there is SQL happening. (The underline character and lower-casing usually denotes a dereferencing operation in Django queries, but in this case it is a 
 <a href="https://docs.djangoproject.com/en/dev/topics/db/queries/#backwards-related-objects">backwards relation</a>, but we don't do anything that devious in troggle.)
 
 <li>You will get very familiar with the <a href="https://docs.djangoproject.com/en/3.2/">online documentation</a>. be sure to be looking that the flavour for the right release of Django (indicated on the bottom-right of the screen: the link here goes to v3.2). You can read it in Polish, Indonesian, Brazilian-Portuguese or whatever if you prefer.