Have you ever wanted a link to go to the bottom of the same page? Well in this snippet you see how..
1) On the top where is says
<p><a href="#C4">See also Chapter 4.</a></p>
is a link going to Chatpter 4 at the bottom of the page if you look at Chapter 4 in the Snippet
<a name="C4"><h2>Chapter 4</h2></a>
<p>This chapter explains ba bla bla</p>
There is <a name="C4"> which was is the same as up on top where the link is to chapter 4.
2) That is IT!