American Headstone - On the other side.

A couple of weeks ago, I published a photograph of a headstone bearing the name of John E Gibbs. Amazingly, I have purchased a glass plate negative of the headstones on the other side of the ivy clad building! It features a number of Pickens family graves. The pair to the right are Asa Pickens who was born in Freetown, Bristol, Massachusetts in 1797 who died in 1883 aged 85 and his wife Sally Cummings who died in 1868 aged 65. The curious headstone to the left marks the grave of George Picken who died in 1912 and his wife Mary B who passed away in 1909. I say curious as the headstone has blank stone rectangles for the dates of death to be carved out of. Does this mean they were far from dead when this photograph was taken?