New York City:   June 25, 1821, Hunt, Harvey W. math inst mkr, 78 Wall.  There is an E. Brown and H. W. Hunt broadside dated May 1, 1835 that states that Harvey W. Hunt was with R. Patten from 1823 to 1834.  1834-35 Brown & Hunt, math inst mkrs, 190 Water.  1835-37 Brown & Hunt, math inst mkrs, 27 Fulton.  Edmund Brown served an apprenticeship with Richard Patten beginning in 1815.  

Baltimore, Maryland:   1840-42 Hunt, Harvey W., Mathematical instrument maker, Granby Street betw Gay & Exeter 60 South St.

Washington, D. C.:   1846 Hunt, Harvey W., mathematical instrument maker.  1850 Hunt, Harvey W., mathematical, optical and precision instrument maker.  The Federal Census of 1850, Washington D. C. lists Hunt, Harvey W., Age 54, Profession Math instrument maker, Born England.

Reference:  Smart, Charles E.   The Makers Of Surveying Instruments In America Since 1700  Troy, New York:  Regal Art Press.  1962