This is relating to his entry in the Edinburgh Gazette
WHITEHALL, July 19,1859.
The Queen has been pleased to present the Reverend Donald McCaig to the church and parish of Mockairn, in the presbytery of Lorn, and shire of Argyll, vacant by the resignation of the Reverend John Sinclair.
http://www.gazettes.co.uk/ViewPDF.aspx?pdf=6929&geotype=...I find the Gazette(s) useful if there is some naturalization, military or ministerial link.