Thomas Charles Clay of Allendale, PEI

Looking for the Clays descended from Thomas Charles Clay, an army surgeon who went to PEI in the 1820's from England. I know his son, my ggrandfather, went to Nova Scotia, but am wondering what happened to the rest of those who stayed behind: Charles and Thomas. Two others, Darius and Henry died with Captain Edward Saville in a shipwreck off the coast.