Thank you for looking, Ken.
I'd guess the photo was taken in the 1890s, judging by the likely age of the man. He bears a family resemblance to his brothers, and if I am right, was born in 1856. All the men on that side of the family went grey early in life!
Edward G Brevis (the photographer) was active at the Victoria Art Studios (as on photograph) from 1895-1908, which limits the likely date 1895-1901.
finta