They were married at a house. The service was conducted by a minister of the Presbyterian church.
Should I enquire at the church or a local historical society. Or both!
How can I find out who supplied the information on the copied entry?
Sandie.
I have just added to my reply.
You enquire with Presbyterians asking for the current location of Rev's register if you cannot find its location via Google. Family history groups anywhere, not just the local one to Raymond Terrace, can have sourced transcriptions. Many marriage ceremonies were conducted in private homes. The 1878 Electoral Roll for that district has two chaps named Steven DAVIS at Nelson's Plains. One was a settler, the other was qualified to vote as a freeholder. There may well be others surnamed DAVIS in that district. You could also search out by the witness names.
It could well be that the document with those full details accurately reflects Rev Boag's register, so perhaps you could contact the person who supplied it to you and ask them where they sourced that document and make your own judgement as to the veracity of the record.
Many of the regional and rural registers were filmed by the LDS in the last decade or so. You may need to make enquiries through that group too. National Library of Australia is another possibility, so too the
https://www.gsv.org.au/ Genealogy Society of Victoria in Melbourne and/or
https://www.sag.org.au/ Society of Australian Genealogists, Sydney NSW
JM