You possibly have these already:
"DUN, MELVIN - At 41 Belmont Street, Aberdeen, on the 19th inst., John Dun, Esq., Grammar School, to Agnes, only daughter of the late George Melvin, Esq., merchant, Aberdeen."
Monday, Sept. 22, 1856
Publication: Caledonian Mercury
(and various other newspapers including the London Morning Chronicle)
"At 41, Belmont Street on the 16th inst., AGNES MELVIN, sister of the late Dr James Melvin, Rector of the Grammar School, and relict of John Dun, one of the Teachers in that School, aged 72. - Friends will please accept of this (the only) intimation."
Wednesday, Sept. 22, 1875
Publication: Aberdeen Journal