Thanks for the details.
I'll have another look and see what else I can find.
Yes, two Channon families actually.
1263/1842 V18421263 91 LEADER NICHOLAS - PLUMBER ELIZABETH - LD= RC St Mary's Sydney
13/1843 V184313 87 PLUMMER WILLIAM - PRIEST ELIZABETH - GB= Independent (Congregational) Sydney, Pitt Street
The Sydney Morning Herald - Thursday 5 January 1843 p.2
By the Rev. Dr. Ross, at his residence, the 3rd instant, Mr. William PLUMMER, of Hinton, to Miss Elizabeth PRIEST, of Pitt-street, Sydney.
The Sydney Morning Herald - Friday 18 September 1846 p.2
On the 1st September, at St. Paul's Church, Auckland, by the Rev. J. F. Churton, William Plummer, Esq., Barrack-Master, to Sophia Sewell, fourth daughter of Captain Marlow, Commanding Royal Engineer, New Zealand.