Hi, Sharon. I took a quick look at the records and found the following in the US & Canadian Census so far:
1850 James 'Caya', age 15, in Champlain, NY (parents Jos & Marguerite)
1860 Did not find him (yet)
1870 James Cayea married w/ 5 kids in Chateaugay, NY, birth of James & Julia = Canada
1880 James & Julia in Burlington, VT w/ James/William/Nellie (20, 17, 13 yrs)
1900 Julia in Burlington, VT w/ Joseph & Nellie Lavoie
1911 Julia (Canadian Census) in Toronto West w/ Joseph & Helen Lavoie, their dau Julia Moss at age 77
1912 Death year listed on FindAGrave stone in Mount Hope Cemetery, Toronto.
Julia Cayea, "widow of James" shows up in 5 or more city directories for Burlington.
Do you have a date for when James died in Winooski? 1900 Census lists Julia as "married" not "widowed"