Thanks for sharing the information from your Your GG-Grandmother's journal . It refers to David Turnbull's second wife, Alice.
His first wife, Eleanor Turnbull née Casement, died in Jamaica in 1843. The burial register for Spanish Town, Jamaica, records that Eleanor Turnbull, wife of David Turnbull Esquire, died aged 36 and was buried on 29 Dec 1843 in the Church Yard of St Andrews in the County of Surrey, Jamaica. Her last abode was given as Spring Garden. The burial ceremony was performed by Alrand Campbell, Rector.
David married again seven months later. The marriage register for St Andrews parish in the County of Surrey, Jamaica, records that: “David Turnbull Esquire, British Commissioner of the British and Portuguese Mixed Commission for the suppression of the slaver trade and Alice Paynter Grant, widow, both of this parish, were married by Licence on the first day of August in the year 1844 by the Honorable and Right Reverend Arbory George Spencer D.D. Lord Bishop of the Diocese as certified by me John Campbell officiating Curate.
This marriage was announced in The Gentleman's Magazine 1844:
"Aug 1: At Jamaica, David Turnbull, esq. her Majesty's Judge of the Court of Mixed Commission, to Alice, dau. of the late John Musson, esq. of Paynter Vale, Bermuda.”
David was the brother of my GGG-grandmother Agnes Turnbull ((ca 1795-1848) and Eleanor was the sister of my GGG grandfather Hugh Casement (1793 - 1863). I am still looking for the marriage of Hugh and Agnes ca 1816.
The above relationship was proved by this passage in a letter David Turnbull sent from Jamaica to Lord John Russell in London on 22 January 1841:
'I was married in the North of Ireland in the Autumn of 1826. I am myself a native of Scotland'.
'My wife is the daughter of the late Mr. Roger Casement, a man of great wealth and respectability in the country of Antrim, with whom I was previously connected by the marriage of my sister to his son'.
[Source: , FO 72/584 and now in the Oxford Dictionary of National Biographies.]