I found in the
Cambridge directory the following
1941 John P.Coleman (Catherine) porter Riverside Press home 9 Lawrence
1944 same info
1946 Catherine widow of John P, clerk 9 Lawrence
some times they have the date of death but not the case here. It narrows it down a bit.
I found in the SSI a John J. Coleman b.Jan.7, 1889 d. March 19, 1945 S.S.No. 015-20-1832 Mass. but does not give the town. It was the only one in that time period. Maaybe he did not collect SS. The directory's skip yrs on line but maybe you could get more info from the
Cambridge Library.
Tina