However, according to historian Roland Saint-Clair, this Act was only a recognition of the Barony of St. Clair existing in the person of his ancestor, Henry II Sinclair, Earl of Orkney and did not constitute a new creation.
[4] According to 18th century herald, Alexander Nisbet, the Lord Sinclair coat of arms is based on the feudal arms of the Earl of Orkney and being the lineal male heir of William Sinclair, 3rd Earl of Orkney.
He died childless in 1750 when the claim to the title passed to his younger brother General James St Clair (d. 1762).
The University College London research project The Legacies of British Slave-ownership and the records of the Slave Compensation Commission, highlights that Charles St Clair, 13th Lord Sinclair owned 666 slaves at the time of abolition in 1833.
[7] dormant 1762–1782 The heir apparent is the present holder's son Harry Murray Kennedy St. Clair, Master of Sinclair (b.