Well done, Eric. I'm very impressed.
I found John Gelling b 1803 ( son of John Gelling and Eleanor Crellin) in 1851.
1851 IOM German district 4, page 4
John Gelling head Mar age 48 miller b Braddan
Alice wife age 41 b German
Margaret Jane dau age 2 b England
JG married Alice Collister 21 June 1847 St Nicholas, Liverpool
Mgt Jane Gelling bap 24 Sept 1848 St Nicholas LP.
I haven't found a burial for Alice.