I am also looking for an ALLEN in MASS- My GG grandfather Ethan ALLEN was born in Webster Ma. We don't know if he had any brothers, we can't find any info. But Ethan had a son Brigham H ALLEN that was born 1845 and was in the Civil War, he was in Co D Ma INF. He enlisted in Charlton Ma, just outside of Worcester Ma. I found some info on ancestry.com. He was listed in the pension rolls.And also found his father on them when I looked.Printed out the pages. If you live near a archive center, they have all the rolls on film. I went to Pittsfield Ma. Good Luck in your search. Also try the LDS family history centers.