Hi Corky,
I looked at the Worcester directories on line which places Daniel J at 30 Aetna yr ending 1921, 1922 he seems to be missing (there is a Daniel J listed but not a polisher), jumps to 1924 he is listed at 60 Green Street. During this time, no wives were listed just heads of household. In 1926 he is listed as living at 23 Chandler with the rest of the Doyle/Hoey families until they all move to 19 Chandler. Could she have died between 1924 & 1926 when he moved in with his sister? I'm sure you have already but did you check with St. John's or where Daniel is buried? And lastly, I believe it is the New Bedford Library who has a list of deaths in Massachusetts beyond 1910.
Just my thoughts, Cheryl