1906 Northbridge City Directory
Hugh Clark, machinist, W. M. W., home 15 High, Whitinsville
7 other Clarks in Whitinsville, including 2 that work at the same place: John J and Robert
1911
Hugh, machinist, W M W, home 10 D St, Whitinsville
next book at ancestry is 1926 and we know he is in Providence by then.
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W M W could be Whitin Machine Works, a cotton machinery manufacturer listed in the front of the directory
if so, google "whitin machine works, whitinsville ma" for lots of results, including
https://en.wikipedia.org/wiki/Whitin_Machine_Worksthe building is still there. the picture looks familiar. I know I have been past it, but I wasn't paying a lot of attention to anything but how to get where I was going.