topic

• Coal mines and mining1

name

• New York (State). State Engineer and Surveyor1
• Sweet, S. H. (Sylvanus Howe), 1830-18991

collection

• Maps of North America1

place

• Allegany County1
• Allegany County (Md.)1
• Maryland1

genre

publisher

• New York State Engineer and Surveyor1

division

• Map Division1

type

• cartographic1