Thanks David - and webfriend Jean (I like that term. Will have to start using it myself!) - for all your efforts on my behalf.

The marriage was from Jurby register, as seen on Mormon filming:

#106726 Jurby marriages 1822-1854 Official Copy [Aug 06 MNHL sp]
1846 Jan 31st, No.93
Robert Clague of the parish of Lezayre and Jane Cavendish of this Parish were married in this church by Licence on this thirty-first day of January in the year one thousand eight hundred and forty six, by me Isaac Brittan, curate.
This marriage was solemnized between us
Robert Clague X his mark and
Jane Clague late Cavendish X her mark
In presence of James Keig, John Wade

It would be so good to finally track Jane down.

Thanks

Sylvia