Purdy - Link Made to Gabriel the Loyalist
I have finally found  the link to Gabriel Purdy, loyalist brother who received land in Nova Scotia after the Revolutionary War.  He came from New York.
There are two Samuel Flintiff Purdys, this is where my confusion arose.

Working back from my grandmother:

1.  Alice Emma Purdy  b. 1911  (married Frank P. Brown)
dau. of
2.  Roy Lockhart Purdy     (married Hattie Winnefred Britton)
son of
3.  Samuel Flintiff Purdy b. 1853    (married  Emma Lockhart)
son of
4.  John William Purdy b. 1830    (married Keziah Fales)
son of
5.  Samuel Flintiff Purdy b. 1810    (married Margaret Knight)
son of
6.  Gabriel Purdy b. 1753, NY    (married Elizabeth Wilkinson)
son of
7.  Samuel Purdy and Winnefred Griffen, Westchester, NY
son of
8.  Samuel Purdy and  Clorinda Streing/Strang, Westchester, NY
Purdy Roots Web Genealogy link