Hello Jane - I have finished trancribing my bit of the 1841 Llanelly census now and those were the only two William Edwards in all that I did. Could it possibly be that he was in Llanelly Breconshire. I have ancestors from there and I was fooled for a long time thinking it was Carmarthenshire. Llanelly Breconshire is a tiny place pearched on the side of a hill which I visited a few months ago. Just a thought. best wishes Diana