Federal Township Plats of Illinois (1804-1891)
Federal Township Plats of Illinois (1804-1891) is a very attractive site with crystal-clear, full-color images of 3,457 plats from the Illinois State Archives. Like the Wisconsin Public Land Survey Records I blogged about in February, these maps can be used with the Federal Land Patent Records Site (try also the Illinois Public Domain Land Tract Sales Database.) In just a couple of minutes, I was able to find a particular land patent and call up a beautifully rendered image of the plat. Plats are also available on CD-ROM—one CD for each county, with full-size printable images.