I wondered if this could be the John Cavendish with Ellen Kissick in 1860 & 70, (and perhaps 1840)? He's the right age but that's all: his occupation, painter, doesn't tie in with previous clerk and lawyer, his birthplace is MA not OH. Father's birthplace isn't give so that's no help!

1880 Census, via Familysearch
Census Place, E.D. 661, Boston, Suffolk, Massachusetts
Family History Library Film , 1254555
NA Film Number , T9-0555
Page Number , 88C
Household:
Name , Relation, Marital Status, Age, Birthplace, Occupation, Father's Birthplace, Mother's Birthplace
David JONES , Self , M , 38 , N.B. , Carpenter , N.B. , ---
Aida JONES , Wife , M , 27 , N.B. , Keeping House , N.B. , N.B.
Josie PIERSON , Wife , M , 27 , ME , Keeping House , ME , ME
Jarves WOURDEEN , Other , S , 45 , N.B. , Carpenter , --- , ---
Fred WOURDEEN , Other , S , 23 , N.B. , Carpenter , --- , ---
John CAVINDISH , Other , S , 40 , MA , Painter , --- , ---
George BLACKMAIR , Other , S , 20 , NY , Clerk , NY , ---
Annie SHED , Other , S , 32 , ME , Seamstress , --- , ---
Elma ATWOOD , Son , S , 19 , N.B. , Without Work , --- , ME

The only other John Cavendish I could find around that age is presumably the son of John and Mary.