Henry Peek De Graaf (3rd great-grandfather) biographies available on the World Wide Web.
http://www.archive.org/stream/sketchesofmenofp01part#page/n797/mode/2u Sketches of men of progress. Published in 1870 by New York and Hartford publishing company: Cincinnati, Greer & company in [New York] . pages 682-683 Note: The article in this archive is incomplete. For the full article see http://startingroots.com/2009/08/06/tell-thursday/
http://www.archive.org/stream/cu31924028835234#page/314/mode/2up Westchester County, New York biographical compiled by W. W. Spooner Published in 1900 by New York History Co. in New York pages 315-317
http://books.google.com/books?id=X5wMAQAAMAAJ&pg=PA173 America’s successful men of affairs: An encyclopedia of contemporaneous biography by Henry Hall The New York tribune, 1895 pages 173-174
http://books.google.com/books?id=nbwTAAAAYAAJ&pg=PA94 Year book of the Holland Society of New York Holland Society of New York, 1897 pages 94-95
obituary in NYTIMES: July 14, 1896 http://query.nytimes.com/mem/archive-free/pdf?res=F20717FF395F1B738DDDAD0994DF405B8685F0D3
- Article about DeGraaf & Taylor Furniture: http://books.google.com/books?id=d6ieSXFM2kIC&pg=PA92 New York’s great industries: Exchange and commercial review, embracing also historical and descriptive sketch of the city, its leading merchants and manufacturers by Richard Edwards Historical Publishing Co., 1884 page 92
Note: The biographies state that H.P. was president of the Bowery Bank or Bowery National Bank. This is not the Bowery Savings Bank which has an article at Wikipedia.org.