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Signature	Maker	Instruments	Comments	Location	References
ROACH, JOHN	Ireland; USA, 1813-91, MIM OIM PHIM SIM	Surveyor's Compasses = Mackay School of Mines, Reno, Nev., Michigan State University Museum, East Lansing, P.C.; Y-Level = USNM.	worked alone in New York from 1833 to 1837 and again from 1843 to 1861; worked with Warner as Roach and Warner from 1837 to 1842; worked with Joseph Charles Sala from 1861 to 1891 when Sala succeeded him.	Cork (1813-33); 116 White (1833-35); 3 Wall Street (1836-37); 293 Broadway (1837-42); 72 Nassau (1842-43); the last five all in New York, N.Y; 720 California Stret (1855-90); 429 Montgomery Street (1891); last two in San Francisco, Cal.	Smart 1; USNM; RSW.
ROACH, JOHN	Ireland; USA, 1813-91, MIM OIM PHIM SIM	Surveyor's Compasses = Mackay School of Mines, Reno, Nev., Michigan State University Museum, East Lansing, P.C.; Y-Level = USNM.	worked alone in New York from 1833 to 1837 and again from 1843 to 1861; worked with Warner as Roach and Warner from 1837 to 1842; worked with Joseph Charles Sala from 1861 to 1891 when Sala succeeded him.	Cork (1813-33); 116 White (1833-35); 3 Wall Street (1836-37); 293 Broadway (1837-42); 72 Nassau (1842-43); the last five all in New York, N.Y; 720 California Stret (1855-90); 429 Montgomery Street (1891); last two in San Francisco, Cal.	Smart 1; USNM; RSW.

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