This is totally .... have I been part of a previous query about this family

After reading the letter transcript you just posted.....I thought, I'll just have a wee look in Scotland's People Marriages for Edward REEVES
The ONLY one I could see as a possibility was 1883 - and I've already viewed and paid for this image back in 2012! I guess I must have been trying to help back then, downloaded that image and never went further, thinking I was on wrong track.

So this is it, maybe nothing, but who knows:
Registered in Dennistoun, Lanark.
Marriage 29th Sept 1883 at Blackfriars House. Dennistoun
Edward REEVES 35, Musician, Bachelor, of 56 Kings Street, Calton, Glasgow, Father: Edward REEVES, Seaman, ---- Deceased
Mother: Helen REEVES, ms CLETHEROE
Elizabeth AILWOOD 29, Domestic Servant, Spinster, of 56 Kings Street, Calton, Glasgow Father: Henry AILWOOD, General Labourer, Deceased
Mother: Agnes AILWOOD, ms DAVIS, Deceased.
Witness: Thomas MARTIN and Agnes SOMERVILLE
Also: Both Bride & Groom have signed with their X MARK. The officiating Minister, Thomas SOMERVILLE has co-signed each as a witness to their marks.
When William married Frances Ada, his father: Edward REEVES, Retired Sailor.
Hmm,
So William had written to Georgina, and she replied but this was 1906, 2 years after John died.
Oh, how curious - Musing out load (as I'm sure you also do

) What lead to Georgina correcting William regards the surname Georgina was married as/to... How did William address her in prior letter's?
* William's mother Elizabeth had a sister, who was said to be in service in Sterling
* William had a sister named Robina
Cheers
AMBLY