A little more...
1940 US Census
Hamilton, Essex, Massachusetts
Address: 267 Winthrop Street
Leland Gerrish 22 born about 1918 in Maine, farmer
Una Gerrish 22 born about 1918 in Maine
Ernest L Gerrish 3 born in Maine
Lance Gerrish 2 born in Maine
Leland's residence in 1935: Dyer Brook, Aroostook, Maine
Una's residence in 1935: Smyrna Mill, Aroostook, Maine
(Residence in 1935 was a question on the 1940 census)
As posted above, in 1940 Una's parents Thaddeus and Annie have also moved to Massachusetts.
Annie Shaffer born about 1885 in Elgin, New Brunswick, Canada; died 1949 in Maine
Annie Shaffer's FATHER:
David William Shaffer (son of Wilhelm Frederick Shaffer and Christiana Jacobine Shevantzer) was born 04 April 1841 in Weinsdurg, Germany, and died 24 Nov 1897 in Albert co., New Brunswick, Canada
Annie Shaffer's MOTHER:
Phoebe Ellen Doucett born about 1857 and died 20 June 1891.
(SOURCE: online family tree "Descendants of Wilhelm F. Shafer of Canada")
Looked for Annie and her parents (using their names per marriage record) and found David, Phoebe, and children in 1891 census in Elgin, Albert, New Brunswick, Canada.
David A. Shaffer b 1873 - d 1936
George Leonard Shaffer b 1875 - d 1945 in Elgin
Herbert Shaffer b 1884 - d 1954
Annie b 1885 <-----------------d. 1949 in Maine
Colby b 1887 - d 1971 Moncton, New Brunswick (m Pearl Ogelvie)
May Olive Shaffer b 1889 ----------d 1980 Maine (m J. Osneo)
(not completed - !)