"Due to access to several books in Trip Kahn's fine library I was able to do considerable research on a family who made some of the most beautiful tools ever produced in New Jersey. Lebbeus Dod (1739-1816) and his three sons Stephen (1770- 1855), Abner (1772-1847), and Daniel (1778-1823) were all mathematical instrument makers besides possessing a number of other skills such as clock-making, gun smithing, and iron turning. At various times they all worked in Mendham and signed the instruments they made there to that effect."  

Abner was Lebbeus Dod's second son.

Reference:    The Tool Shed, A Journal of Tool Collecting published by CRAFTS of New Jersey, Number 120, February 2002; Alexander Farnham