The coal and iron mines, of the Union Potomac Company, (incorporated by Virginia,) and of the Union Company, (incorporated by Maryland) comprising upwards of fifty-six thousand acres of land, situate in Alleghany County, Maryland, and in Hampshire County, Virginia ([s.n.], 1840)
Goldsmiths'-Kress no. 31392.17. - OCLC, 18420157. - Reproduction of original from Kress Library of Business and Economics, Harvard University