Tristram Radcliffe was listed in the Jamaican Quit Rent books for 1754 as the owner of 507 acres of land in Clarendon and 332 acres of land in Vere, total 839 acres.
"A List of landholders in the Island of Jamaica together with the number of acres each person possessed taken from the quit rent books in the year 1754", TNA CO 142/31 transcribed at http://www.jamaicanfamilysearch.com/Samples2/1754lead.htm
Brother-in-law → Sister-in-law
Son-in-law → Father-in-law
Tristram Radcliffe married Dorothy, co-heir and daughter of Ennis...