I have finally identified the T.B. McCAUSLAND who married Mary Lucetta STRAUB on 26 Oct 1874, Marion Co., OH.He is Thomas H.B. McCAUSLAND, born 1839/40 in OH, son of Thomas T. McCAUSLAND & Sarah __?__.Beginning with his parents' census records...
1830: not found.
1840: OH: Fairfield Co: Amanda Twp: p. 301: McCASTINE Thomas T100001-00001
1850: OH: Fairfield Co: Amanda Twp: Amanda: p. 254A: McCAUSLAND, Thomas 57 M Millwright PA McCAUSLAND, Sarah 40 F OH McCAUSLAND, Thomas 10 M OH McCAUSLAND, James 1 M OH McCAUSLAND, Jacob 1 M OH McCAUSLAND, James H 50 M PA
A line connecting Jacob and James indicates they are twins.James H. McCAUSLAND is presumably the elder Thomas's brother.I don't find Thomas T. or Sarah after 1850.
1860: OH: Fairfield Co: Berne Twp: p. 353B ECKERT, Catharine 46 F OH McCAUSLAND, T. H. B. 20 M Farmer OH McCAUSLAND, James H. 11 M OH McCAUSLAND, John E. 11 M
1870: OH: Delaware Co: Thompson Twp: p. 505A: McCASHLAND, H. B. 30 M Farmer OH McCASHLAND, Isaac E. 21 M Farmer OH McCASHLAND, James H. 21 M Farmer OH
Thomas H.B. McCAUSLAND is not found in the 1880 census, but we find his widow in Delaware City, Delaware Co., OH (p. 521A).What I have is online at my web site in the form of linked family group sheets.You can hook into them from Thomas & Mary Lucetta's page: