In 1951 my attention was drawn by the Hon. Mary Parnell, of the Galpin Society, to a MS in the Somerset Record Office, entitled Directyones to Wynde the Home. It consists of a single leaf on which are inscribed sixteen calls for use in the Chase, together with the name of each. The document bears the signature of one Henry Sayer, Honorary Master, and the handwriting appears to date from about the beginning of the seventeenth century. Apart from a transcript printed some seventy years ago by the Commission on Historical Manuscripts, the piece is practically unknown. Its interest lies in the fact that the required sounds are recorded, not in musical notation but in a code whose meaning is no longer clear. As the Commission's Report says, it ‘very much needs a key’. Miss Parnell and I were, however, anxious to try to discover that key, and this paper is mainly a brief account of the attempt.