Andrew, about Alice's profile. I don't believe that both headstones are for Alice. The Edson/Mary stone is double-sided - with parents on one side and children Phil and Alice on the other. This unusual stone has two finished faces, the sides are finished, and the top is rough cut. It's probably 6 to 8 inches thick. The stone is in a grassy wooded area with maple leaves on the ground. The upright stone is embedded in a large chunk of granite that rests on a granite slab-on-ground. The name POTTER across the bottom of the stone is in fancy curlicue font. I sure would like to take a look at it. I've put in a photo request, maybe a volunteer will provide additional info.
The LITTLE ALICE stone is poured concrete with the word GRAVE in the center of a wreath. I'm not sure it says Alice because it looks like an 'S' on the end. It's a much earlier stone in a grassy area with other similar stones. It could be an infants section. Many cemeteries have them.
If this is Alice (d. 1869) - and it is possible - her parents buried her and later (1918) added her and Phil to the family stone. A clue could be the location of both stones. The person who added the phots lived there when she inventoried the cemetery; but she lives in Colorado now.
Maybe a photo volunteer will come through.