Yes, I noticed that (Denman) but was curious to the Ryde Post Office bit. I see New Ryde is North of the river, but was unsure of where Ryde would have been at that time, North or South. I also found another Concord Farm to the West of Sydney mentioned in a letter from a soldier in WWI in 1917. It was to a Miss Winnie Shire, Concord Farm, Curra.
I also noted the bit about the stray horse and the brand JV. There is a list of horse brands from 1800 in the archives but they are not online. Perhaps, a lead there.
Regards
Malky