He married Olivia Mariamne Fancourt , who was a widow of Jacob Cassivelaun Fancourt , an assistant surgeon in Madras who had died in 1800 . As he was gazetted assistant secretary to the new Governor of Penang in 1805 , he married Olivia Mariamne Fancourt , a widow who was formerly married to Jacob Cassivelaun Fancourt , an assistant surgeon in Madras who had died in 1800 .