I guess Harriet must have been "across" in 1841. Strangely enough, there was a "stray" Gelling living with Alexander & Elizabeth Catner at High Street, Shadwell, Middlesex, in 1841:

"Ellen Gelling 35 Independent N"

The Catners were living in the former shop of James Kewley, and Elizabeth had reported James Kewley's death. Jane Kewley was living with the Catners in 1851, as was another Manx "Stray": on the High Street,

"Margaret Skillicorn 60 U Income from Lands Isle of Man"

With reference to Robert Kewley, Cooper, & wife, their ages in the MI are the same as in the PR: Robert aged 77 in 1816 and Isabel aged 81 in 1817.