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Signature	Maker	Instruments	Comments	Location	References
HEARTTE, ISAAC T.	USA, 1785-1836,		sea captain; published "Heartte's Lunar Tables"; partner of John G. Brown (1830-31), see Brown and Heartte; partner of William Ewin from 1833 until Heartte's death in 1836, see Ewin and Heartte; probably only his partners were instrument makers.	Baltimore, Md.	Smart 1; Coffeen B; USNM.
HEARTTE, ISAAC T.	USA, 1785-1836,		sea captain; published "Heartte's Lunar Tables"; partner of John G. Brown (1830-31), see Brown and Heartte; partner of William Ewin from 1833 until Heartte's death in 1836, see Ewin and Heartte; probably only his partners were instrument makers.	Baltimore, Md.	Smart 1; Coffeen B; USNM.

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