the meanings of gestures, expressions and body language, and describes signs and gestures in use at the time, some of which resemble signs still in use, while Philocopus explores the use of lipreading by deaf people and the possibility of deaf education, and is dedicated to Bulwer's two deaf brothers. Another writer of the same time, George Dalgarno, recognised that sign language was unrelated to English. In 1661 he wrote that "The deaf man has no teacher at all and through necessity may put him upon... using signs, yet those have no affinity to the language by which they that are about him do converse among themselves." Finally, the diarist Samuel Pepys described a conversation between George Downing and a deaf boy in November 1666:But, above all, there comes in the dumb boy that I knew in Oliver's time, who is mightily acquainted here, and with Downing; and he made strange signs of the fire, and how the King was abroad, and many things they understood, but I could not...British Sign Language has evolved, as all languages do, from these origins by modification, invention and importation. Early Deaf Education The Braidwood schools Thomas Braidwood, a teacher from Edinburgh, founded 'Braidwood's Academy for the Deaf and Dumb' in 1760, which is believed to be the first school for deaf children in Britain. The school primarily taught oral communication methods, as described by Francis Green - whose son attended the Braidwood school - in the anonymous treatise Vox oculis subjecta. In this account, Green describes how his son Charles would surely develop "a perfect acquaintance with language both oral and written", and how deaf pupils were given "a tolerable general understanding of their own language [English] so as to read, write, and speak it, with ease". Green also describes Braidwood's views of spoken language:Mr Braidwood hath frequently intimated to me, as an opinion founded upon his experience in this art, that articulate or spoken language hath so great and essential a tendency to confirm and enlarge ideas, above the power of written language, that it is almost impossible for deaf persons, without the use of speech, to be perfect in their ideas.Joseph Watson was trained as a teacher of the deaf under Thomas Braidwood. He eventually left in 1792 to become the headmaster of the Asylum for the Deaf and Dumb in Bermondsey. He described his teaching methods in detail in his