John Abbott, sr. is mentioned in the diary of Pleasant Mills resident Isa Leek; as she lived in Pleasant Mills there is a good chance that Mr. Abbott lived either in or near Pleasant Mills as well, although we can not be 100% certain just yet. He is mentioned in the diary as having died in September of 1907.
It's not known if he is related to another family from the Mullica region, that of John L. Abbott of Nesco. John lived from 1875-1946, and he was married around 1900 to Henrietta Taylor (7 Feb 1875-1954). (She was the daughter of William B. Taylor and Mary Ella Crowley).