Top of the stone appears to be in Welsh
Stone reads:
YMA
Y G?wedd Gweddillion
Margaret Gw?ig Wiilliam
Morgan or die? .?? Yr hoi? A
Illegible line, but I see 24 th and 1849
Another illegible line.
The rest is info for George Selway, aged 76, and his beloved wife Margaret, aged 86.
, George aged 76 years
Margaret aged 75 years