Daisy,
Thank you for the net links. Very useful and engaging. The following was written by his father Richard Owen b1754- on the question of his son James Hawkins Owen.
'April 22, 1827. — My eldest boy, James
Hawkins Owen, died at Demerara of yellow
fever, and was buried there.'
Buried on Demerara is new to me - memorial/record suggest James is with his parents on Isle of Bartholomew
James did not marry. The Catherine death/burial was his mother and reportedly died 24 Nov 1838 West Indies. You have raised a Catherine Owen death/burial Dec Qtr. 1838 Lancaster 21/291 exactly the same period and year - only location being in question. This search is far from over and I am indebted to the kindness of those who give of their time to help. Frank.