Hi Kimmy
I've checked the 1861 & 71 census:
1861 Census, Cornwall, Mabe
Class: RG9; Piece: 1568; Folio: 27; Page: 10;
John Bowden, Head, Mar, 30, Ag Lab, b. Cornwall, Constantine
Eliza Bowden, Wife, Mar, 34, Cornwall, Constantine
Eliza Jane Bowden, 8, Cornwall, Maw*
Caroline Bowden, 6, Cornwall, Mabe
John Henry Bowden, 5, Cornwall, Mabe
Elizabeth Bowden, 2, Cornwall, Mabe
Sarah Collings, 17, General Serv
1871 Census, Cornwall, Mabe
Class: RG10; Piece: 2298; Folio: 78; Page: 9;
John Bowden, Head, Mar, 40, Farmer of 60 acres, b. Cornwall, Constantine
Sarah Bowden, Wife, Mar, 27, Cornwall,
Caroline Bowden, 16, UnM, Farmers daughter, Cornwall, Mabe
John H Bowden, 15, Farmers son, Cornwall, Mabe
Elizabeth Bowden, 12, Scholar, Cornwall, Mabe
William Bowden, 5, Cornwall, Mabe
Arthur Bowden, 3, Cornwall, Constantine
James Bowden, 2mo, Cornwall, Constantine
It looks like his first wife probably died and he re-married.
Will check the deaths and marriages and get back to you.
Bren