Charlotte Wallace Croskery (nee Brown) death date

[samwilson]

We say:

She was still alive on 13 August 1874 as she was present at the wedding of her son Samuel Maxwell West Croskery to Mary Gilmour in Troon, Ayrshire, Scotland.

and cite West and Mary's marriage registration:

https://archive.org/details/MarriageRecordOfSamuelCroskeryAndMaryGilmour

If a regular Marriage, Signatures of officiating Minister and Witnesses. If irregular, Date of Conviction, Decree of Declaration, or Sheriff's Warrant.
(signed) Jo[?] Heming, minister of the Established Church Troon.
(signed) Wallace Brown Croskery, Witness; Marian Gilmour, Witness.

Which doesn't say she was there (just that she was).

Any more idea of a death date?