Hi Donna and Sylvia,
Just a word of caution.
Sylvia, since Donna and I had that exchange of messages, you have found out more about your particular William Moore from his son's marriage cert.
There is no evidence that your W. Moore even came from Maughold - Mary was old enough to have been working / living elsewhere before he was born, and could have gone home for the birth, or gone to her familiar church to have him baptised. What you have from the marriage cert is that he was deceased at that date, and a mariner. If he was a well known Maughold farmer I think this would have been known and included on the marriage cert. There were many William Moores.
Clive suggested that mariner could have been miner, if a transcribed record. Do they allow you to look at the original marriage entry at the local record office, to double-check this? Or look at the parish register? Brian posted some seamen options.

Sue