She had acquiesced in his wish that none but blind persons should be employed in the Institution, and that no trades should be carried on there except such as the blind could work at unaided. Her own experience, as well as the theory of her parents, had shown that more can be done for the blind by including them with, than by separating them from the sighted. But the argument to which she yielded was one often urged by Levy: that it would be impossible to interest the public in the scheme, unless the blind worked unaided, and it was made clear that they were capable of following a trade. He also urged, and with more reason, that the teacher of the blind should be a blind man, who knows from his own experience the difficulties and the limitations of blindness, and who has overcome them; for the teacher who knows these only from theory will not have so intelligent an appreciation of them, nor be so likely to discover the aids required by the blind. No one could have worked with more enthusiasm or energy than Levy himself. He learnt trades and tried experiments with tools, introduced brush-making, and prepared the way for the great development which he and Bessie now foresaw. She also was not idle; the possibility of employing women was always before her, and she made experiments with regard to occupations that might be suitable for them. Her private scheme was now about to expand into an Association managed by a Committee. Before the final step was taken she wished to secure all the objects for which she had hitherto laboured, and to prepare for the changes which were imminent. She endeavoured to obtain friends and allies, and the success which attended her efforts was no doubt in part owing to the fact that she was the daughter of a bishop and was herself blind. She was spared the long and weary search for patrons and support to which many are condemned. Her name, her position, her privation, secured immediate attention from those who were able to give both money and influence. So great was her success, that in the winter of 1855 she decided, all the necessary preliminaries having been arranged, to appeal to the Queen. In January 1856 she sent to the Queen an autograph letter, written on her Foucault frame, and with the consent of Her Majesty the correspondence is now reproduced: