Library of Congress Prints and Photographs Catalog

Prints and Photographs Online Catalog (Prints and Photographs Reading Room, Library of Congress)

While I'm on a tear, I want to bookmark this for future reference. This is an online catalog for the Library of Congress. I didn't do an exhaustive set of lookups, but I was impressed with the photos I found (Civil War Negro troop photos).

The girls may find this useful for school projects.