Norwich: Thomas Harland (1735-1807); surveying instruments and clocks. Windham: Gurdon Huntington (1763-1804); clocks and surveying and other instruments. Woodstock: Peregrine White (1747-1834); surveying instruments and clocks. ----: Smith, Cordial (fl. 1775); surveying instruments. DELAWARE Wilmington: George Crow (c. 1726-1772); surveying instruments and clocks. MARYLAND Baltimore: Benjamin Banneker (c. 1734-1806), practitioner. Andrew Ellicott (1754-1820), practitioner; surveying and astronomical instruments. Benjamin K. Hagger (c. 1769-1834); mathematical and surveying instruments. Frederick: Frederick A. Heisely (1759-1839); clocks and mathematical instruments. Nottingham: Benjamin Chandlee, Jr. (1723-1791); clocks and surveying instruments. Chandlee & Bros. (fl. 1790-1791); clocks and surveying instruments. Ellis Chandlee (1755-1816); surveying instruments and clocks. Ellis Chandlee & Bros. (fl. 1791-1797); clocks and surveying instruments. Isaac Chandlee (1760-1813); surveying instruments and clocks. MASSACHUSETTS Boston: Jedidiah Baldwin (c. 1777-1829); surveying instruments. Aaron Breed (1791-1861); surveying instruments. Bartholomew Burges (fl. 1789); scientific instruments. Jere Clough (18th century); surveying instruments. John Dabney, Jr. (fl. 1739); mathematical instruments. Jonathan Dakin (fl. 1745); mathematical instruments and balances. John Dupee (fl. after 1761); surveying instruments. Samuel Grainger (fl. 1719), practitioner. Stephen Greenleaf (1704-1795); mathematical instruments. Thomas Greenough (1710-1785); mathematical, surveying, astronomical, and nautical instruments. William Greenough (fl. 1785); surveying instruments. Isaac Greenwood, Sr. (c.1725-1750), practitioner. Isaac Greenwood, Jr. (1730-1803); mathematical instruments. Benjamin K. Hagger (c. 1769-1834); mathematical and surveying instruments. James Halsie I (fl. 1674), practitioner. James Halsy II (1695-1767); mathematical and surveying instruments.