Tomcat Documentation

Okay, I'm ready to take the time to really understand Tomcat and how it
works.  In order to do so, I'm downloading the 4.1.12 build and installing
it on my super-duper high-powered workstation (which, being over a week old,
is already an out-of-date clunker, but that's a different issue).

I wanted to download the documentation as well.  The thing is, the
documentation is spread all over various HTML pages and .TXT files.  Is
there any comprehensive set of Tomcat documentation, or do I have to trace
down each branch of the documentation site downloading information?

Not coincidentally, I'm doing the same thing with Struts, and once again
there's nice online documentation but nothing downloadable.

Failing finding downloadable documentation, does anybody know of a utility
that will make it easy to download HTML documentation en masse?

Joe