I have a William Mackie married to Elspet Roy with children William (b 1806 Jamaica d 1889 Oberon Australia m Anne Grey Gibb - my tree), Robert, Jane Bolton Mackie, and Anne Bolton Mackie (b 1814 Jamaica d 1884, Bolton Cottage Forres Scotland, m Charles Kay).
From what I understand William Mackie snr went to Jamaica in 1790 and owned a sugar plantation, returned to Scotland 1818 and lived at Boyne house. Became interested in Australian shipping company Leith and Edinburgh but appears to have died and his son William was left with the idea of travelling to Australia with the shipping company. I am interested in anything to do with the Jamaican story.
I have no further information on Robert other than to say that the name Robert is strongly used in my family's tree, Robert Mackie b 1833 son of William and Anne Grey Gibb, had a brother Thomas Icely (b1836). My son descends from Thomas Icely - Icely Gordon (known as Jack), Robert Bruce, Robert Gordon and Jack Icely Robert.