This striking angel is the work of Brenda Putnam, but the cemetery’s site (in an article that has since disappeared) was vague and confusing on dates. It said that the bronze angel was cast “after 1910” as a replica of an original granite sculpture. The earliest dated Putnam work listed in her sparse Wikipedia article is from 1917. Brenda Putnam would have been twenty years old in 1910; she would thus have been a teenager when the granite version was done, if the date “1910” means anything at all. Henry Kirke Porter, identified as “the best-known Porter here” by the cemetery’s site, died in 1921, and perhaps that gives us a better guess at the date of the sculpture.
If old Pa Pitt had to guess, he would imagine that those glorious wings were too heavy for granite, and the bronze cast was made when the original sculpture proved unstable.