Information comes from my grandmother, Lillian B. Hilliard Macomber who was the granddaughter of Helen Merrill and g-granddaughter of Levi (s/o Asa and Miriam) and Syrena Merrill who lived in the family homestead on Flag Pond Road. I do not know about all of the folks in this cemetery, but we do have pictures of some of them.
I have also included a diagram of a small cemetery across the street behind Grace Dow's house (Grace lived there in the 1960's and 1970's that I know of.) Including Gardner, Eliza and Louisa Merrill--this information comes directly from the stones. I visited this site in 1997 and found it fairly overgrown so took down what information I could reach and read. There may have been a fourth grave there, but the trees and bushes had taken over that corner completely.
Merrill Family Cemetery on Flag Pond Road, Saco Maine (Page 8)
Merrill Cemetery behind the Dow house (Page 9)