I think your Smith's are from Marshfield, Washington Co., VERMONT, not MAINE.

1860 Census, Worcester, Washinton, VT
T W Smith, 31, Lumbering, MA
Sabrina B Smith, 33, VT
Lucetta M Smith, 10, MA
Louisa Smith, 8, MA

1870 Census, Marshfield, Washington, VT
Daniel Smith, 40, House Joiner, MA
Sabina Smith, 42, VT
Caira Smith, 7, VT
Willie L Smith, 4, VT
Mirah Davis, 19, MA

1880 Census, Barnet, Caledonia, VT
Theophulus W. Smith 52, Carpenter, MA, MA, MA
Sobrina Smith 50, VT, MA, RI
Aenie E. Smith 17, VT
Willie S. Smith 15, VT

1900 Census, Marshfield, Vt
Freeman Sanborn, 54
Louisa Sanborn, 48
Lillian Sanborn. 20,