Papers of the Sykes family of Sledmere > Papers of Sir Mark Sykes (1879-1919) (Second deposit of Papers of the Sykes family) > Material used by Shane Leslie for his book 'Mark Sykes. His life and letters' > Extract from 'Revue du Monde Musulman'. 'In memoriam Sir Mark Sykes', by Louis Massignon, with letter from the author to Lady Sykes, 3 November 1919