No sooner had this appointment been completed, than Lord Hertford was recalled, and Hume was left for a time chargé d'affaires at Paris. The ambassador had been appointed by Lord Bute, but had chiefly acted during the administration of Grenville, with whom he and his connexions were not, as Hume's correspondence has shown, on very friendly terms. In July, 1765, the Rockingham administration was formed, in connexion with which Lord Hertford became lord-lieutenant of Ireland, and his brother secretary of state with the leadership of the House of Commons. Hume had thus to perform the functions of British representative until the Duke of Richmond arrived as ambassador in October. Of the manner in which he performed the duties of his office, Lord Brougham says: By Lord Aberdeen's kindness I have been allowed to examine the correspondence of the embassy with Marshal Conway during these four months; and it is highly creditable to the philosopher's business-like talents, and his capacity for affairs. The negotiations of which he had the sole conduct related to the important and interesting discussions of Canada; matters arising out of the cession by the peace of Paris; and to the demolition of the works at Dunkirk, also stipulated by that treaty. His despatches, some of them of great length, most of them in his own hand, are clearly and ably written. The course which he describes himself as pursuing with the very slippery and evasive ministers against whom he had to contend, particularly the Duc de Praslin, appears to have been marked by firmness and temper, as well as by quickness and sagacity. His memorials, of which two or three are given, show a perfect familiarity with diplomatic modes and habits, and they are both well written and ably reasoned. His information must have been correct; for he obtained a knowledge of the secret proceedings of the assembly of clergy, which, though convoked for the purpose of obtaining the usual _don gratuit_, chose to enter upon the discussion of all the clerical grievances; while they kept their deliberations carefully secret, and were opposed by the parliament of Paris as soon as their proceedings became known. Mr. Hume obtained a very early, though somewhat exaggerated account of these things, through two of the foreign ambassadors; and when he communicated it to the Bishop of Senlis, he was treated with contempt, as if nothing could be so wild, and as if some enemy of the church had invented the fable to discredit her. Marshal Conway appears by his despatches (which are also excellent) to have rested his hopes of these differences passing off, on the prevailing irreligious spirit in France, where "the Dauphin alone," he says, "has any care for such matters; and he has of late taken a military turn." In a short time the whole ferment