Historical miniature gamers can never have enough research material. Here is a huge collection of primary source material on the United States from the Antebellum through Reconstruction. This University of Michigan digital library has 8,500 books and 50,000 journal articles with 19th century imprints. The collection should be of particular interest to Civil War and Mexican American war gamers.
The Chicago Tribune has a gallery with some long-forgotten photographs of the Chicago Exposition of 1893. It’s a visual treat for Victorian era enthusiasts. And while you’re at it, I highly recommend the book “Devil In The White City,” a true-crime story about a serial murderer n Chicago at the time of the fair.
Google has the full text of Life magazine issues from 1936 – 1972. An incredible resource.
Here’s an online gallery with some very good images of pirates, and related documents and maps. I know that the pirate gaming craze has largely subsided, but its one of htose things that I’ve always wanted to to.