diff --git a/handbook/troggle/troglaptop.html b/handbook/troggle/troglaptop.html
index defd09a63..2edea63a9 100644
--- a/handbook/troggle/troglaptop.html
+++ b/handbook/troggle/troglaptop.html
@@ -461,17 +461,17 @@ To get the same javascript libraries as the expo server:
 but you don't need these for most troggle development: copies of what is needed are in the troggle git repo. One example that is not in the troggle git repo is <a href="https://aardgoose.github.io/CaveView.js/installation.html">"CaveView"</a>.
 
 <hr />
+<!-- absolute addressing so that this fragment can be copied eveywhere and still work -->
+Go on to: <a href="/handbook/troggle/trogarch.html">Troggle architecture</a><br />
 
-Go on to: <a href="trogarch.html">Troggle architecture</a><br />
-
-Return to: <a href="trognotes.html">Troggle programmers' guide</a><br />
+Return to: <a href="/handbook/troggle/trognotes.html">Troggle programmers' guide</a><br />
 Troggle index: 
-<a href="trogindex.html">Index of all troggle documents</a><br />
-Go  to:  &#8251; <a href="../computing/basiclaptop.html">Basic laptop</a><br />
-Go  to: &#8258; <a href="../computing/surveylaptop.html">Survey laptop</a><br />
-Go  to: &#9734; <a href="../computing/bulkupdatelaptop.html"> Bulk Update laptop</a><br />
-Go  to: &#9728; <a href="../computing/winlaptop.html">Windows Bulk Update laptop</a><br />
-Go  to: &#9775; <a href="../computing/wsllaptop.html">WSL laptop</a><br />
-Go  to: &#9874; <a href="troglaptop.html">Troggle development laptop</a><br />
+<a href="/handbook/troggle/trogindex.html">Index of all troggle documents</a><br />
+Go  to:  &#8251; <a href="/handbook/computing/basiclaptop.html">Basic laptop</a><br />
+Go  to: &#8258; <a href="/handbook/computing/surveylaptop.html">Survey laptop</a><br />
+Go  to: &#9734; <a href="/handbook/computing/bulkupdatelaptop.html"> Bulk Update laptop</a><br />
+Go  to: &#9728; <a href="/handbook/computing/winlaptop.html">Windows Bulk Update laptop</a><br />
+Go  to: &#9775; <a href="/handbook/computing/wsllaptop.html">WSL laptop</a><br />
+Go  to: &#9874; <a href="/handbook/troggle/troglaptop.html">Troggle development laptop</a><br />
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 </html>