1871 Northumberland County:
Walsh: No Gilbert. None in Newcastle.
Welsh: No Gilbert. None in Newcastle.
Welch: No Gilbert.
Newcastle
WELCH
Michael, 67, Ireland, Labourer, Wesleyan Methodist
Ann, 66, PEI, WM
Mary Jane, 42, PEI, WM
Nothing in 1861 census in Northumberland either.
Dan Johnson's newspaper vitals:
http://archives.gnb.ca/APPS/NewspaperVitalStats/Details.aspx...http://archives.gnb.ca/APPS/NewspaperVitalStats/Details.aspx...