This couple is in my ancestry as well. I have biography pages for them at my website, although they are currently limited to vital records information. Given that John's death is recorded at the North Beverly Congregational Church (Second Congregational of Beverly), he is undoubtedly buried there. There is a foot and headstone in the cemetery that probably are his. The footstone says Capt. J. Dodge, but it looks like a modern inscription in an old style of carving done with a dremel tool. I would need to see it in person to confirm this. The two stones are of different materials (sandstone and slate) which would not have been done originally, so this supports the idea that things have been tampered with there. I haven't seen any information about Sarah's death or burial, leaving me to assume she is buried next to John. He died in 1723 (modern style of dating - double dated 1722/1723 in the records to indicate the Old and New Style of month arrangements), and given how early in the year it was, his age at death puts his birth year most likely in 1635.