In 1837, the Trustees decided that the appointment of these Assistants should be permanent, and fixed a standing scale of remuneration; the members of this class were known as “_Permanent Assistants_.” In 1838, at the time of the removal of the Library, the “Supernumerary or Temporary Assistants” were engaged at the rate of £2. 12s. 6d. a week, or 8s. 9d. a day, for every day actually employed. Their number was increased from time to time, to provide the extra labour required in preparing the new Catalogue, and in the additional duties consequent upon the rapid increase of the Library. In 1847, a slight change for the better took place in their status. In practice the promotion was from the Supernumerary to the Permanent class of Assistants; but there was no recognised claim to such promotion on the part of the Supernumeraries. In the year 1851, the distinction between the Permanent and Supernumerary Assistants was abolished, these Assistants, in all Departments, being considered as forming one body, although divided into two classes. In all these and subsequent changes, Panizzi was always the one who strove to promote the welfare of his subordinates. Panizzi, Thomas Watts, J. Winter Jones, Edward Edwards, and John H. Parry, formed a committee for framing the rules for the new General Catalogue of the whole Library; each of them was separately to prepare, according to his own views, rules for the compilation of the projected work. These were afterwards discussed collectively, and when any difference arose, it was settled by vote. The rules so drawn up were sanctioned by the Trustees, on the 13th of July, 1839, and printed on the 15th July, 1841. They were acknowledged at the time and still continue to be the most complete ever compiled, although attempts have, at various periods, been made to improve upon them: nor has the approbation bestowed upon them been merely of a local character; it has extended throughout Europe and America. The work occupied several months, the busy staff often being detained until late at night, on which occasions Panizzi invited his colleagues to share refreshments with him. The above rules engaged Panizzi’s earnest attention, and on the 18th of March, 1839, he sent in the following report to the Trustees:—