If it helps I have a couple of other tidbits, as follows...
Elizabeth Allwood was the daughter of Francis Allwood and Jane WADE.She and John Vidal were married on May 15, 1791 in St. Elizabeth's Parish, Jamaica.She was born on Oct 26, 1774 in Savanna la Mar, Jamaica and christened on Jan. 6, 1775 (same place).She died on Oct. 18, 1858 in Newport, Nr Barnstable, Devon and was buried in St. John the Baptist Church, Bishop Tawton, Devon (presumably this is England) Her will was granted probate on Nov. 6, 1858 in Exeter and her effects were under 300 pounds.
As for Lettice Allwood I have very little.She was buried on Feb. 19, 1742 or 43 in Westmoreland Parish, Jamaica.She married Charles Vidal and they had 6 children.It is possible that she died in child birth or shortly after as I have her children born in 1733, 1735 (?), 1738, 1740, and (?).If she died in 42 or 43 she likely did die in child birth.
Hope some of this will help.Please keep in touch and let me know if you find further information about these families and I will do the same.