This is a large wall map of Cook County, done in 1861 by J.W. Flower. The map was published by S.H. Burhans & J. Van Vechten. It was engraved, printed, colored, and originally mounted by Edward Mendel who was a famous Chicago based (162 W. Lake st.) lithographer and engraver known for his currency designs and early Chicago prints. The map is colored and includes a reference key for railroads, canals, wagon roads, churches, houses, and a complete list of Cook County post offices.

The map includes over 30 inserts of various towns throughout Cook county as well as a business directory list for many of the towns. A large number of the towns in this map have since been unincorporated, renamed, or incorporated into the city of Chicago. For example, the town of Long John and Minnehaha no longer exist. The town of Taylorsport is now known as Glencoe, Brickton is now Park Ridge, and Dunton is now Arlington Heights. Pine Grove is now part of the Lakeview neighborhood of Chicago and Jefferson, once a small settlement of traders, hunters, and farmers, is now a densely populated neighborhood of Chicago known as Jefferson Park. Images of important buildings and places decorate this map throughout. Some of these images include the Women's College of Northwestern, Bryan Hall, the Tremont House, Graceland cemetery, and a view of the city from the lakefront.

Surrounding the map is a floral vignette border containing twenty advertisements for businesses throughout the cook county some of which include apothecaries, horse veterinarians, brewers, and a horse boarding and sales stable. Numerous historical features are displayed throughout this map. Just to the north and south of the Chicago are two lines running diagonally from the lake to the southwest of the map. These lines are the start of large Indian boundary lines that run deep into the state of Illinois. These lines came about in 1816 when the Sauk and Fox tribes ceded land within a 20 mile corridor to the U.S. at the Treaty of St. Louis. The land outside the boundary lines was owned by the Native American tribes until the Chicago treaty in 1833. Another interesting historical marker found in the map is the Tomb of Stephen A. Douglas which lies just south of Cottage Grove. Soon after this map was made, the land around the tomb became the site of a Union Army volunteer training center that thousands of Chicago area recruits would soon pass through. As the war went on, the training center became a Confederate Soldier prison camp that came to be known as Camp Douglas.