Hi,

1900 chickasaw Nation, Indian Territory
Andrew J. Holt, b. AL June 1838, M30yrs, farmer
Mary E., wife, b. AL June 1842, 13/8 children
Lee R., b. AL Aug 1877, day laborer
Ada, b. AL April 1884
James P., b. AL March 1874, farmer
Lela, daulaw, b. TX Feb 1881, 0/0 children
Joe A. Oxford, b. TX June 1871, single, day laborer

1910 Hewitt, Carter, OK
James P. Holt, b. AL, 36, M1-10yrs, general farmer
Lelah, wife, b. OK, 29, 3/2 children
Lois P., b. OK, 8
Opal, b. OK, 2
Andrew J. b. AL, 68, M1-51yrs, own income
Mary E., b. AL, 67, 13/8 children
John Fike, b. AR, 20, single, farm laborer general farm

Andrew died after the 1910 and before the 1920 Census.

1920 Hewitt
James P. Holt, b. AL, 45, general farmer
Lelah B., wife, b. TX, 38
Ada Opal, b. OK, 12
J. P., b. OK, 4
Floy O, b. OK, 3 3/12ths
Mary E., b. AL, 76, ma, widow

Mary died after the 1920 and before the 1930 Census. Death certificates started being used in 1908 and were mandatory by 1917. There are restrictions on who can order a copy. Oklahoma doesn't public their vital record dates which makes genealogy more difficult in this state.

I'd contact the Carter County Genealogical Library, http://gshm.org/genealogical-library/ and order copies of Andrew and Mary's obituaries. Successful Searching!