Morgan Grey's address on the '41 Census is "Maeseglwys".
Have you checked "View Apportionment" which identifies "House, Garden, Stables, etc".
Note - I,ve been checking that area for Thomas Thomas - Butcher" on the '44 marriage cert. In 1844 he's at "pengorse" - the '41 Census address is "Pontbren" - and more than one householder enjoys that address.