Khotanese, a language belonging to the Iranian branch of Indo-European, which was spoken in the first millennium CE, has a rich literature including the Book of Zambasta, a poetic exposition of Mahayana Buddhism in 24 chapters. This poem makes use of three metres, whose nature has been a matter of controversy for more than a century. While its first editor, Ernst Leumann (1859-1931), regarded Khotanese metre as essentially quantitative (moraic) and...