Antique 1870s G.W. Gray & Son Map of Illinois (32 x 20")"This remarkably preserved 32" x 20" antique map, titled "Map of Illinois," was published by G. W. Gray & Son, a prominent Philadelphia based firm established in the late 1860s. Renowned for producing one of the most successful atlases ("Gray's National Atlas") and for being "one of the last to employ hand coloring on maps," their meticulous detail is evident here. Likely dating from the 1870s, this map provides a fascinating historical snapshot of the