The true mental condition of the deaf was realized, however, by few, if any, before the time of Christ. He, as He opened the ears of the deaf man and loosened his tongue, talked to him in his own language, the language of signs.
St Augustine erred amazingly when he declared that the deaf could have no faith, since "faith comes by hearing only." The Talmud, on the other hand, recognized that they could be taught, and were therefore not idiotic.
It is, however, with those who attempted to educate the deaf that we are here chiefly concerned. The first to call for notice is St John of Beverley. The Venerable Bede tells how this bishop made a mute speak and was credited with having performed a miracle in so doing. Probably it was nothing more than the first attempt to teach by the oral method, and the greatest credit is due to him for being so far in advance of his times as to try to instruct his pupil at all. Bede himself invented a system of counting on the hands; and also a "manual speech," as he called it,--using his numerals to indicate the number of the letter of the alphabet; thus, the sign for "seven" would also signify the letter "g," and so forth. But we do not know that he intended this alphabet for the use of the deaf.
It is not until the 16th century that we hear much of anybody else who was interested in the deaf, but at this date we find Girolamo Cardan stating that they can be instructed by writing, after they have been shown the signification of words, since their mental power is unaffected by their inability to hear.
Pedro Ponce de Leon (c. 1520-1584), a Spanish Benedictine monk, is more worthy of notice, as he, to use his own words, taught the deaf "to speak, read, write, reckon, pray, serve at the altar, know Christian doctrine, and confess with a loud voice." Some he taught languages and science. That he was successful was proved by other witness than his own, for Panduro, Valles and de Morales all give details of his work, the last-named giving an account by one of Ponce's pupils of his education. De Morales says further that Ponce de Leon addressed his scholars either by signs or writing, and that the reply came by speech. It appears that this master committed his methods to writing. Though this work is lost it is probable that his system was put into practice by Juan Pablo Bonet. This Spaniard successfully instructed a brother of his master the constable of Castile, who had lost hearing at the age of two. His method corresponded in a great measure to that which is now called the combined system, for, in the work which he wrote, he shows how the deaf can be taught to speak by reducing the letters to their phonetic value, and also urges that finger-spelling and writing should be used. The connexion between all three, he goes on to say, should be shown the pupils, but the manual alphabet should be mastered first. Nouns he taught by pointing to the objects they represented; verbs he expressed by pantomime; while the value of prepositions, adverbs and interjections, as well as the tenses of verbs, he believed could be learnt by repeated use. The pupil should be educated by interrogation, conversation, and carefully graduated reading. The success of Bonet's endeavours are borne witness to by Sir Kenelm Digby, who met the teacher at Madrid.