Acknowledgements
The publication of this study on the Sufi orders in twentieth-century Egypt was greatly enabled by Jos van Aken, Arabist and Islamologist at the Immigration Department in the Hague; Menno van den Berg, specialist in multilingual computing; Corné Hanssen, lecturer in Arabic and Islam at Utrecht University; Dr. Luitgard Mols, Arabist and historian of Islamic art, Director of Research Bureau Sabiel, the Hague; and Dr. Arnoud Vrolijk, Interpres Legati Warneriani, Curator of Oriental Manuscripts and Rare Books at the Leiden University Libraries.