Tim
If Robert Caine II was b 1804 I don't think he could be the husband of Margaret Crowe md 1853
Censuses for Robert & Margaret Crowe Caine show him to have been b @ 1830

1861 Census Isle of man, German R.G. 9 / 4420
Ballahoun ?
Robert Cain Head Mar 30 Ag: Labor Douglas
Margaret Cain Wife Mar 28 Douglas
John Cain Son 6 Scholar Douglas
William Cain Son 4 Douglas
Maria Gill Relative 14 Scholar Douglas

1871 Census Isle of man, Marown R.G. 10 / 5772
Ellerslie
Robert Cain Head Mar 40 Fram Lab. Braddan
Margaret Cain Wife Mar 38 Bride
John Cain Son Unm 16 Farm Lab. Braddan
William Cain Son Unmar 14 Farm Lab. Patrick
Robert Cain Son Unm 7 Braddan
Margaret Cain Daur 4 Braddan
Emily Cain Daur 1Douglas

1881 Census Isle of Man, Douglas RG 11 / 5603
14 Hanover Street
Robert Cain Head Mar 52 General Laborer Braddan
Margaret Cain Wife Mar 52 House Keeper Bride
John Cain Son 27 Mariner Braddan
Margaret Cain Daur 13 Milliner Braddan
Emily J. Cain Daur 11 Scholar Douglas
John Brew Boarder Unm 4 Douglas

I'm not sure which Caine line this Robert is from.

DJD