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.