diff --git a/eo/tutorial/html/eoTopDown.html b/eo/tutorial/html/eoTopDown.html
index 0895baa1..c9a668ac 100644
--- a/eo/tutorial/html/eoTopDown.html
+++ b/eo/tutorial/html/eoTopDown.html
@@ -48,7 +48,7 @@ populations,
 ...).</li>
 
 <li>
-<a href="eoLesson3.html">Lesson 4 </a>- The same algorithms - again! -
+<a href="eoLesson4.html">Lesson 4 </a>- The same algorithms - again! -
 but now fully operational: <font color="#FF6600">every component</font>
 of the algorithm can be defined <font color="#FF6600">on the command-line</font>,
 except the type of genotype; moreover, you now have a full library, i.e.
@@ -95,7 +95,7 @@ e.g. binary, n-ary, or even specific mate selection (your brain and my
 beauty)! Add your own to the basic algorithm using the template files.</li>
 
 <li>
-Lesson 7 - Use predefined generic <b><font color="#999900">representations</font></b>.
+Lesson 8 - Use predefined generic <b><font color="#999900">representations</font></b>.
 The <b><font color="#999900">eoFixedLength</font></b> and <b><font color="#999900">eoVariableLength</font></b>
 super classes allow quick definition of new genotypes that handle identical
 Atoms, together with generic variation operators.</li>