The most important point in our program of rational education, in the view of the intellectual condition of the country, and the feature which was most likely to shock current prejudices and habits, was the co-education of boys and girls. The idea was not absolutely new in Spain. As a result of necessity and of primitive conditions, there were villages in remote valleys and on the mountains where some good natured neighbor, or the priest or sacristan, used to teach the catechism, and sometimes elementary letters, to boys and girls in common. In fact, it is sometimes legally authorized, or at least tolerated, the means to pay both a master and a mistress. In such cases, either a master or a mistress gives common lessons to boys and girls, as I had myself seen in a village not far from Barcelona. In towns and cities, however, mixed education was not recognized. One read sometimes of the occurrence of it in foreign countries, but no one proposed to adopt it in Spain, where su...