For those of you who don't know about this resource (it was announced in
1998 on Maps-L), I just rediscovered it ...

Historical Map & Chart Project
View or Download

This collection contains over 21,000 Maps and Charts ranging from the
year 1655 to 2001. Downloaded as jpg or MrSid file.

http://historicals.ncd.noaa.gov/historicals/histmap.asp

Angie