Charles Erskine (bap. 1680- 1763), was a judge and the President of the Scotch Society for Propagating Christian Knowledge.
Charles Erskine to Hans Sloane, 1732-09-28, Sloane MS 4052, f. 191, British Library, London
John W. Cairns, ‘Erskine, Charles, Lord Tinwald (bap. 1680, d. 1763)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/8847, accessed 3 Sept 2017]
Relationship to Sloane: Virtual International Authority File: