Guy Le Strange (1854-1933) pioneered the study of the historical geography of the Middle East, and especially Persia, notably in his Lands of the Eastern Caliphate (Cambridge, 1905) and the present work which contains an English translation of Mustaufī’s Nuzhat al-qulūb. Reynold Alleyne Nicholson (1868–1945) was one of the foremost European scholars of Islamic mysticism. His pioneering translations and editions of major Sufi texts—including Dīvāni Shamsi Tabrīz (1898), The Mystics of Islam (1914), and the monumental eight-volume edition and translation of Rumi’s Mathnawí (1925–1940)—remain foundational works in the field. He also authored the influential Literary History of the Arabs (1907) and several studies on Islamic poetry and personality in Sufism. Nicholson's literary sensitivity and rigorous scholarship transformed Western understanding of Sufi thought and literature.