I don't know if there is any link with Elizabeth Hodge, the mob I am researching are from Tedburn St Mary in Devon. Unknown Mcgrotty however, may be a definite possibility as there appears to be relatively few of them around. His age would seem to indicate that he was born c1810-1820, this fits in with Henry Mcgrotty (born 1818 in Derry, Ireland)who was my gg grandfather. Unknown Mcgrotty may be a sibling of Henry. Although it is a shot in the dark, if you're in a barn and keep shooting, you're bound to hit something eventually!! I'll hang on to this info. in case one day I can find the link.