Adam Gerard Mappa was a Dutch type-founder, Patriot and active colonel in a local militia. In 1794 he became the agent for the Holland Land Company in New York (state) and three years later supervisor in the recently set up village of Barneveld.
Oldenbarneveld, December 30th 1801 Sir! Mr. van der Kemp communicating to me your desire of committing to writing a description of the Phenomena Which I Saw floating on the Surface…
Oldenbarneveld February 16th. 1825. Sir! Since Christmas 1789 a few days after my arrival at New-York, when, invited by your politeness, I enjoyed the honour at your Table of renewing…