Listed in the 1851 census as Arthur, age 8.84

As per Hoar:
“When great grandfather Thomas died, the homestead went to his eldest son John Arthur McNutt Colpitts known as "Captain Arthur" who is said to have been a very difficult character. His wife was Abigail Charlotte Sherman known as Aunt Debbie. They raised 6 children in the old home (one infant death). Arthur's two mothers (his own mother Ann Margaret and his mother-in-law Mary Sherman were also a part of the household. . . . Perhaps the two mothers were good friends; perhaps this is reflected in the fact that they share a headstone in the "new" Pleasant Vale cemetery. Great grandfather Thomas is buried in the Old Burying Ground (Pioneer Cemetery) located on the hillside above Robert's old home in the Vale.”
Source:
Author: Hoar, William S.
Title: Steeves and Colpitts, Pioneers of the Upper Petitcodiac
Publication: Name: Tangled Roots Press; Location: Vancouver, BC; Date: 1988;
Call number: 0-9692490-1-2208