Good luck Joan in trying to sort out which James, John or William Callow family you belong to. At present, I don't think I can help you any further; as far as I can tell, the James you mention is not part of our Callow family tree, but you never say never in this business!
If you haven't already, you could try the following free websites:
1.IOMFHS-Lawsons BMD micro site for wills;
2.website of Manx Notebook (www.isle-of-man.com/manxnotebook);
3.Latter Day Saints/IGI-found at (www.familysearch.org).
Best wishes Shan Callow