Maine Births and Christenings, 1739-1900: Calvin Chamberlain was born on 8 Oct 1810 in Dover-Foxcroft, Piscataquis, Maine to Samuel & Abigail Chamberlain.

Maine Marriages, 1771-1907: Calvin Chamberlain married Lavinia (or Lavina) Philbrick on 22 Oct 1838 in Mount Vernon, Kennebec, Maine AND on 30 Oct 1838 in Kennebec County, Maine AND in Oct 1838 in Bangor, Penobscot, Maine AND married Mary Converse on 15 Mar 1847 in Piscataquis County, Maine.

1850 census of Foxcroft, Piscataquis, Maine p262: Calvin Chamberlain, age 39, born in Foxcroft, farmer, listed with wife, Mary R, 37 and daughter, Lucy B, 8 and brother, Luther, 33 as well as Thursa Spearing, 13, Harrison Chandler, 22 and Joel T Pratt, 18.

1860 census of Foxcroft, Piscataquis, Maine p11: Calvin Chamberlain, age 49, born in Maine, listed with wife, Mary R, 47 and son?, Charles F, illegible age.

1870 census of Foxcroft, Piscataquis, Maine p27: Calvin Chamberlain, age 59, born in Maine, farmer, listed with wife, Mary R, 57.

Published in the Piscataquis (ME) Observer 19 Jul 1877 p2: "Mr. Calvin Chamberlain is making a great improvement upon his premises. He has raised his dwelling another story and erected a Mansard roof. Other improvements will be made, and when fully completed, it will make one of the finest residences in Foxcroft."

1880 census of Foxcroft, Piscataquis, Maine p56A: Calvin Chamberlain, age 69, born in Maine, parents born in Massachusetts, listed with wife, Mary R, 67 in household of brother, Luther Chamberlain, 63 & his wife, Cornelia C, 49 and his widowed mother-in-law, Louisa Hammond, 72, as well as "Others", Sarah M Cushing, 28, Thomas E Kitchen, 30, John H Harrison, 25, and Lizzie Tolman, 34.

1900 census of Foxcroft, Piscataquis, Maine p3B: [unreadable] Chamberlan, age 89, born in Oct 1810 in Maine, parents born in Massachusetts, farmer, married but no wife there, head of household, listed with him is widowed sister, Cleora E Jeffards, 73 and widowed sister-in-law, Cornelia Chamberlain, 69.

According to the IGI at familysearch.org, Calvin Chamberlain was born in 1811 in Foxcroft, Piscataquis, Maine to Samuel Chamberlain & Abigail Tucker and married Mary R Convers on 15 Mar 1847.