Here's an article in the local fishwrapper about the "guns of Fort Monroe";

http://www.dailypress.com/news/dp-local_am...0,5492307.story

And here is a PDF that appears to be a scan of some archival record, with a bunch of nitty-gritty details;

http://www.dailypress.com/news/dp-now-pdf-...,568088.acrobat