Calendar of N. Y. colonial manuscripts – indorsed land papers ; in the office of the Secretary of State of New York. 1643 -1803 (1864)
This is an index of Colonial Manuscripts. The original documents can be from at the NY State Archive in Albany, NY but this PDF file is a great resource to if any information about people you are researching are listed in this index.
https://archive.org/details/calendarofnycolo00alba