Thanks Jean.
Yes I have got them at Crogga in 1841 and I know that Matthias died in 1850 and the info given with Margaret as a washerwoman is correct.

I am trying to find out if I have any other Kewley relatives which is why I am looking for Matthias' brothers.
I found them on 1861 census but when I looked on the National Archives website I couldn't work out how to go about finding more info about the ordinary seamen around that time. If there are any tips on that it would be useful too.
I presume the Nat Archives would have records reporting if they were killed in action or were discharged.
I know the vessels they were on did go to the US but I don't kow if they could have settled there or not.
If anyone has any thoughts please let me know.
Thanks again
Viv