There is 1 James Radcliffe bpt 19 Mar 1783 s/o John and Elinor Quayle Radcliffe. James the s/o of John Radcliffe buried 13 Apr 1783. James is not mentioned in his father's 1811 will. This my family I do not believe this is your James. There does not seem to be bpt records for either James or Ann with the date of birth dates you reference in IOM records.