In case you don't know about the web site:
http://www.benish-industries.com/hamilton/hamilton.php
And also, a treasure linked from that site is a series of maps for Matt Helm's adventures.
http://www-personal.umich.edu/~pdmce/mattmaps001.htm
I'm taking the map for the particular book and adding it to the text with Sigil. (For my own copy, of course)
AJ