"one of the most impressive theological writings of the century and often marked by the eloquence of lofty moral convictions'." said by Leslie Stephen, according to The age of Dryden by Richard Garnett, on Googlebooks p226.
His uncle was Robert Barclay (1611/12–1682), see ODNB article by Brian M. Halloran, 'Barclay, Robert (1611/12–1682)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [1], accessed 3 December 2007.
Christian Barclay: see ODNB article by
Gordon DesBrisay, 'Barclay, Robert, of Ury (1648–1690)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [2], accessed 3 December 2007. and - for children: P. G. M. Dickson, 'Barclay, David (1682–1769)’, rev., Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 10 Aug 2008