His description of Alawite doctrines was based on a document called Kitab al-mashyakha ("The Manual of the Shaykhs"),[17] which he said he had bought from a Christian merchant from Latakia.[2] This document appears to have differed in certain respects from other sources on Alawite doctrine.[17] For many years it was thought to have been lost and only available through the extracts quoted in translation by Lyde.[17] In 2013, it was announced that the document Lyde had used had been discovered in the archives of the Old Library of Jesus College, Cambridge.[18] Lyde had bequeathed it to his old college, and, apparently, had sent it to Cambridge shortly before his death.[18]