RootsWeb file of J. carlson at snet.net:

Joseph DUNHAM, b. by 1789, Falmouth, Cumberland, ME, m. __ HUSSEY & had Enos DUNHAM (1809, {Falmouth or Vassalboro, Kennebec Co.}, ME - 1 Dec. 1895, Corinna, Penobscot, ME). Enos m1. Rebecca MERRILL & had Georgia / Georgiana Merrill DUNHAM, b. 24 July 1837, Falmouth, ME, m. 30 June 1867, Sumner Lewis SKILLIN (30 Mar. 1842, Garland, Penobscot, ME - 17 Jan. 1917, Chico, Butte, CA). Sumner & Georgia had SKILLIN:

Mabel Dunham (9 May 1868 - 3 Aug. 1953) m. J. H. KING & Eugene O. MELVIN.
Ida May (4 Sep. 1869 - 18 July 1967, Oakland, Alameda, CA) m. 22 Dec. 1895, Alfred TENNENT
Helen Crummett (6 Dec. 1870 - 25 Feb. 1968) m1. 24 Dec. 1893, Ambrose Charles BURKE, who d. 9 Oct. 1903; m2. 5 Nov. 1905, Menno S. HOOVER.
Harry Wilbur, 15 Aug. 1872, Maine
Fred Lewis, b. 6 Sep. 1877 [8?], Paradise, Butte Co., CA; m. 23 Dec. 1922, Emma BRANNS.

[For some of the above details, Google "enos dunham' +"rebecca merrill."]

FamilySearch database of the 1880 census, Kimshew, Butte, CA, SKILLIN:
T. L., 39; Georgeann, 40; Mable, 12; Ida M., 10; Helen C., 9; Henry W., 7; Fred L., 2. All born in Maine except Fred.

FamilySearch pilot site has a copy of the 1900 census, Kimshew T., Butte Co., CA: SKILLIN, Sumner, b. Mar. 1842; Georgiana M., b. Juy 1837, married 33 years, had five children, five living, son Frederick, b. Sep. 1878. Some of these were still of Butte Co. in 1920.

Corinna, Penobscot, ME, 1860, DUNHAM:
Enos, 50; Susannah [REED], 50; Georgianna M., 21; Charles R., 12.

Corinna, ME, 1880, DUNHAM:
Enos, 71; Susanna, 71; Charles R., 21. Also in household, Patrick CROWLEY, 21; Clara A. GIVEN, 18.