Published by A.H. Mueller & Co., 2nd & 340 Locust St., Philadelphia, Pennsylvania, c. 1890s. Mueller was a prolific producer of Pennsylvania county maps and atlases in the late nineteenth and early twentieth centuries, with known works ranging from the 1890s through at least 1916. His firm specialized in detailed county and township mapping for the greater Philadelphia region and beyond, emphasizing road conditions, property boundaries, and municipal organization.

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