Union Co., Ohio, Marriage Book 2, page 189: Alexander Snodgrass & Melissa Mitchell; married 17 Oct 1848.

1850 census, Darby Twp., Union Co., Ohio, page 125, #1689/1709? (enumerated 9 Sep):
Alex Snodgreass, 24-M-OH farmer, $500
Melissa D. Snodgreass, 22-F-OH
Anthony Snodgreass, 1-M-OH

1860 census, Homestead P.O., Iowa Twp., Iowa Co., Iowa, #981/1022 (enumerated 1 Aug 1860):
Alex'dr Snodgrass, 35-M-OH farmer, $6000/400
Melissa Snodgrass, 30-F-OH
Anthony Snodgrass, 11-M-OH
Sarah Snodgrass, 2-F-IA
Mariah Bayett, 16-F-IA
Wm. Lennard, 27-M-OH state driver
Thos. Smith, 25-M-OH laborer

1870 census, Darby Twp., Union Co., Ohio, page 54, #203/191:
Alex Snodgrass, 45-M-OH farmer
Melissa Snodgrass, 43-F-OH
John A. Snodgrass, 20-M-OH
Irena Snodgrass, 11-F-IA

1880 census, Columbus, Franklin Co., Ohio, page 343, #14/14:
Alex Snodgrass, 55-M-OH/PA/PA married, saloon keeper
Melissa Snodgrass, 53-F-OH/OH/OH married
Anthony Snodgrass, 30-M-OH/OH/OH married, farmer

(unknown newspaper) (Marysville, Ohio), 12 Apr 1883:
January term. Melissa D. Snodgrass vs. Alex. Snodgrass. Alimony.

1900 census, Montgomery Twp., Columbus, Franklin Co., Ohio, 50-54-3-21:
(Laura Underden household)
Alexander Snodgrass, 75-M-OH/PA/PA Feb 1825, boarder, widowed, coal miner
- - - - - - - - - -
1900 census, Center Twp., Delaware Co., Indiana:
Wm. J. Harper, 45-M-OH/OH/OH ___ 1855, widowed, blacksmith, rents house
Cleland Harper, 20-M-OH/OH/IA Jan 1880, son, polisher silver
Carrie Harper, 18-F-OH/OH/IA Apr 1882, daughter
Ruth Harper, 6-F-OH/OH/IA Aug 1893, daughter, at school
M. D. Snodgrass, 72-F-OH/Ireland/PA June 1822[sic], boarder, widowed, 5 children, 1 living

Ohio Death Certificate (FamilySearch):  Alexander Snodgrass, died 26 Dec 1906, Columbus, Franklin Co., Ohio; age 79 years; birthdate, ___; born Rosedale, Ohio; male; white; farmer;married; father’s name, ___ (born ___); mother’s name, ___ (born ___); informant, Erma Bidwell; burial, Milford Center, Ohio.