This volume discusses the Bhaik?uki manuscript of the Candrala?kara (“Ornament of the Moon”), a commentary of the twelfth century based on the Candravyakara?a, Candragomin’s seminal Buddhist grammar of Sanskrit. The discovery of the Bhaik?uki script and of all available written sources are described. The detailed study of this codex unicus of the Candrala?kara is accompanied by a facsimile edition and extensive tables of the script, a long-felt desideratum in the field of palaeography. The Buddhist author of the commentary has been identified for the first time, and the nature of his treatise and its position in the Candra school of grammar have been expounded. The history of the manuscript and newly discovered traces of the Bhaik?uki script in Tibet are discussed. This publication will serve as a prolegomenon necessary for the preparation of a critical edition of the Candrala?kara, which until now was believed to have been lost irretrievably. The Bhaik?uki Manuscript of the Candrala?kara will appeal to specialists with interests in a variety of fields such as Indian palaeography, grammar, Buddhism, history, and Indo-Tibetan studies.