Nicasius studied at Leyden and Orleans and also became a Doctor of Law. He was Advocate to the Court of Holland and a Captain in the service of the States General. Nicasius emigrated from Arnhem in Gelderland to New Netherland in 1653. He came to America as a widower with five children. He was first counsellor to Director General Peter Stuyvesant from 1653 to 1657, schout fiscal of New Amsterdam in 1656-7, and Schout-Fiscal of New Utrecht in 1660. He was allotted a plantation in 1657 at New Utrecht and obtained a patent for 25 morgens on 28 Dec 1660. He remarried in 1655 to Tryntie Cregier. They had no children and had a serious argument which ended in their separation. He resided during the latter part of his life in a stone house with a tile roof on his farm in the village of New Utrecht. He was the first to have such a tile roof with red tiles brought from the Netherlands. He was a man of unusual acquirements, an author, a statesman, a lawyer, and an expert in military affairs with special knowledge in fortifications.

In Dec 1654 he was Advocate Fiscal of the States General or United Netherlands.

New York Dutch Reformed Church Marriages
1655
26 dicto.(May) Nicasius de Silla, Van Aernham, en Tryntje Crougers, Van de Hage.