The season was now advancing, and no time was to be lost if the explorers wished to take advantage of the best season for doubling Cape Horn. On the 8th January, 1826, therefore, the two vessels once more put to sea, and rounded the Cape without any mishap, though landing at the Falklands was rendered impossible by fog and contrary winds. Anchor was cast on the 28th March in the roadstead of Rio Janeiro, and, as it turned out, at a time most favourable for the French to form an accurate opinion alike on the city and the court. "The emperor," says Bougainville, "was upon a journey at the time of our arrival, and his return was the occasion of fetes and receptions which roused the population to activity, and broke for a time the monotony of ordinary life in Rio, that dullest and dreariest of towns to the foreigner. Its environs, however, are charming; nature has in them been lavish of her riches; and the vast harbour, the Atlantic, rendezvous of the commercial world, presents a most animated scene. Innumerable ships, either standing in or getting under weigh, small craft cruising about, a ceaseless roar of cannon from the forts and men-of-war, exchanging signals on the occasion of some anniversary or the celebration of some festival of the church, whilst visits were constantly being exchanged between the officers of the various foreign vessels and the diplomatic agents of foreign powers at the court of Rio." The division set sail again on the 11th April, and arrived at Brest on the 24th June, 1826, without having put into port since it left Rio Janeiro. We must remember that if Bougainville did not make any discoveries on this voyage, he had no formal instructions to do so, his mission being merely to unfurl the flag of France where it had as yet been rarely seen. None the less do we owe to this general officer some very interesting, and in some cases new information on the countries visited by him. Some of the surveys made by his expedition may be of service to navigators, and it must be owned that the hydrographical researches which alone could be undertaken in the absence of scientific men were carefully made, and resulted in the obtaining of numerous and accurate data. We can but sympathize with the commander of the _Thetis_, in his expression of regret, in the preface to his journal, that neither the Government nor the _Academie des Sciences_ had seen fit to turn his expedition to account to obtain new results supplementary of the rich harvest gleaned by his predecessors.