Hi Susan,
This is where you got your earlier information from Daisypetal a couple of years ago (as on your other post you said you couldn't remember where the details came from)
http://www.rootschat.com/links/04pv/ Just to recap, Daisy gave you Jane's 2nd marriage reg in 1850 to John Lever Walker, and their 1851 census details
So William Colling had died between 1841-1850 and in 1841 census was living in Sunderland
The GRO index to marine deaths 1837-45 lists a William Collins (page 461) a Wm. Collins (p. 357), and a Wm. Collings (p.256) no ages or other information is given, and it might be worth going through all the marine deaths index as they're not in alphabetical order and I just had a quick look - there could be more.
Barbara