Hi again - Just looking at the US Census Records from 1830, etc. The Austin P. Bussey buried at Westernville Presbyterian you mentioned must have been a son of Benjamin Bussey. The breakdown of ages and sexes within Benjamin's household suggests agreement with the mention of Austin P arriving in that area when he was 14 years of age.
Austin P. Bussey appears as a householder in the 1840 Census records for Western, Oneida, NY.
There are two Austin Busseys listed in the 1850 census, one in NY and an older Austin (born 1808) living in Windsor, Massachusetts with Anna Bussey, age 91. I believe this would have been Nancy (Anna) Morse Bussey.
The Peter Bussey in Lowell in 1847 appears to have been an unrelated Bussey.
Walker