There were two James Nicholson's born in NB who were both 4 yrs old during the 1871 Canadian Census.
One was Scotch in origin, Baptist religion, census at 03 Moncton f, Westmoreland 186, New Brunswick.
The other was Irish origin, Church of England, census at 04, Sussex k, King's 176 New Brunswick.
In the 1910 US Census, a James S. Nicholson who was b. Canada lived in Portland Ward 8, Multnomah, Oregon. His immigration year was 1892, parents b. England. James S. Nicholson was 45y, wife Estelle R. was 32y, born England, dau. Sarah E. was 12y, born California and dau Estelle J. 6y born Oregon.
Do you know James Sanderson Nicholson's wife's name?