Switching subjects just for a minute:
page 119
Montserrat
1812 Mary Dyer 273 Oxford
Now to figure out what that listing is ...
List of Wills proved in the PCC from 1800 to 1812 inclusive.
So no, not the niece of Mark Dyer 1749 as I was wondering. Ah, Mary Hamer Dyer his wife died in 1812 so that is the will you referred to earlier.
page 105
(Parish Registers of St Kitts, starts on p. 100)
Dyer, Henry, Chief Judge of Montst, died 13 Jany. 1788
The one referred to earlier, brother of Mark Dyer 1749.
The John Dyer with the wife and child in 1717 is quite possibly the one who baptised children with wife Margaret in Montserrat starting in 1724, although that does leave a bit of a gap (hmm, which might be explained if that was just when he relocated to Montserrat, and doesn't include children born on Tortola, hypothetically).