M. de Montholon, the new French Ambassador to Washington, was for many years a citizen of Richmond. He is a son of the famous General Montholon, who accompanied Napoleon to St. Helens, and remained with him until his death, and who, while on that island, wrote voluminous memoirs, of great historical value, under the dictation of his chief. Afterwards, as is well known, General Montholon, always a decided Bonapartist, joined the present Emperor of the French in that rash expedition which resulted in the capture of both, and their confinement in the fortress of Ham. While the father was still in prison, the Prince de Joinville made a tour through the United States, and, in passing through this city, fell in with the son, with whom he became so much pleased that he carried him with him on his travels. Shortly after, he was appointed French Consul at New York, it is believed, through the interposition of the Prince. Since the rise of Napoleon, Montholon has been a great favorite, as he ought to be, if for nothing else, yet for the fidelity and sufferings of his father in the cause of the Bonaparte.--He spent all the earlier years of his life in the United States, having married an American lady, the daughter of General Gratiot. He is a man of talents and of very prepossessing address. He was a great favorite in society while he lived here.