James St Clair Erskine, 2nd Earl of Rosslyn
General James St ClairErskine, 2nd Earl of Rosslyn GCB PC , known as Sir James Erskine, Bt, between 1765 and 1789 and as Sir James St ClairErskine, Bt, between 1789 and 1805, was a Scottish soldier, politician, and Acting Grand Master of the Grand Lodge of Scotland, on behalf of King George IV.
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Source: Wikipedia