There is an Alfred Cook b July Quarter 1867 in Liverpool Vol 8b Page 51.

IOM death certificates go to
http://www.gov.im/lib/docs/registries/death.pdf

I am still wondering about the marriage certificateas I did not find a really likely Catherine Turnbull in the 1861 census. On the wrong marriage certificate what are names and occupations of fathers?
Is it possible that "Sailor" was transcribed as "Tailor"?