Syriac scholar. He was educated at King’s College Cambridge, studying Greek and Latin; he subsequently became an independent scholar, based in London. He edited and translated (sometimes into Latin, rather than English) a large number of Syriac texts, mainly historical: The Syriac Chronicle known as that of Zachariah of Mitylene (1899, ET only; with F. J. Hamilton); The Sixth Book of Select Letters of Severus (2 vols.; 1902–4); Chronica Minora, II–III (CSCO 3, 5–6; 1904, 1906; with I. Guidi and J.-B. Chabot); Vitae virorum apud monophysitas celeberrimorum (CSCO 7–8; 1907; includes the Life of Yuḥanon of Tella); Hymns of Severus (PO 6–7; 1909–11); Eliae Metropolitae Nisibeni Opus Chronologicum, I (CSCO 62–63; 1910); Severus of Antioch: a Collection of Letters (PO 12, 14; 1919–20); Historia Ecclesiastica Zachariae Rhetori vulgo adscripta, I–II (CSCO 83–84, 87–88; 1919, 1921, 1924); John of Ephesus, Lives of the Eastern Saints (PO 17–19; 1923–5); Johannis Ephesini Historiae Ecclesiasticae pars tertia (CSCO 105–106; 1935–6).