sentences:  Mappa became the New York City's very first type-manufacturer (on 22 Greenwich Street, Manhattan) but, even though he could produce Oriental letters, the business was not a success.In 1794, he took over from Gerrit Boon an appointment as agent of the Holland Land Company in Trenton.His best friend François Adriaan van der Kemp, whom Mappa once called a hermit, came to live in the town's surroundings on a farm.