Deacon William and Dorothy (Furbish) Trickey are my GGGG grandparents. I visited that little burial ground once, about 20 years ago; I'm sure I took pictures of it, but I can't find them now. It was very overgrown at that time. If you have any pictures of the stones or could take some, I would love copies. I don't know exactly where they lived. All I know about the name change was found in "The “Spice Slades” of Chelsea, Massachusetts: The History of the Company and Genealogies of the Slades, Layns, and Trickey/Miltons" as follows: “In 1851 he and his family [Samuel Trickey and wife Martha Layn] changed their surname and he was hence known as Samuel Milton. The census reports the family as Trickey in 1830, 1840, and 1850.”
Re the other stones: Deacon William had a son, Elder John Trickey (1769-1848), who married Abigail Davis (1777-1866). Their children were William Tyler (the one who changed his family name), Thomas D., Ebenezer, Sarah, and Dorothy. Dorothy married a cousin John Trickey, and one of their children was Ellen Amanda, who died as a child. I think the unnamed baby boy of the Trickey/Miltons was their first child; he died 13 Mar 1818. My ancestor was the youngest son of Deacon William and Dorothy--Deacon Benjamin, who married Olive Hussey.
If you can share any additional info or pictures, I would certainly appreciate it. Let me know if you need my e-mail address.