Hi Doug
Where and when did John Quayle die? Too many to guess. Brian Lawson's burial list does not have Catherine November 9, 1841.
There appears to be two John Quayle/Catherine Moughtin families having children at the same time in Kirk Michael and Lezayre.The "other" family married 1803 in Jurby.
Have you got the right family ? Is that death also the "other" family, although it is still not there.
Looked for re-marriage after ? death of John, but did find a marriage as a widow 1836 to George Gill Bates , but could not find a death for her..Like Frances could not find them on the census.Where did the family end up ?
All this could help

Davud Dwyer