Map of Blair County, Pennsylvania : from special surveys
General-content county map also showing buildings in rural areas, householders' names, and forested areas; real-property tracts, lot numbers, and building coverage also are shown in all the town/village insets (but esp. for Altoona, Hollidaysburg, and Tyrone). Relief shown by hachures. Hand col. to emphasize township boundaries and territories. At foot of statement of attribution: Published by the authors. "Entered according to act of Congress...
Geil & Freed - Freed, Isaac G. - Barnes, Rufus L. - Thos. S. Wagner's Lith