Their report being favourable, the two frigates arrived at the entrance of the bay, but the _Astrolabe_ was driven back to the open sea by a strong current, and the _Boussole_ was forced to join her. At six o'clock in the morning, after a night passed under sail, the vessels again approached the bay. "But," says the narrative, "at seven in the morning, when we were close to it, the wind veered so suddenly to W.N.W. and N.N.W., that we were forced to give way, and even to bring our ships to the wind. Fortunately the tide carried our frigates into the bay, and we escaped the rocks on the east by half a pistol's range. I anchored in three and a half fathoms, with a rocky bottom, half a cable's length from shore. The _Astrolabe_ had anchored in the same depth, and upon a similar bottom. In all the thirty years I have spent at sea, I have never seen two vessels in greater danger. Our situation would have been safe had we not anchored upon a rocky bottom, which extended several cables' length around us, and which was different from what MM. de Flasson and Boutevilliers had reported. We had no time to make reflections; it was above everything necessary to get out of our dangerous anchorage, to which the rapidity of the current was a great obstacle." However, by dint of much skilful tacking, La Perouse succeeded. Ever since their entry into the bay the vessels had been surrounded by pirogues swarming with savages. The natives showed a decided preference for iron, in exchange for fish and the skins of otters and other animals. After a few days' stay their number increased rapidly, and they became, if not dangerous, at least a nuisance. La Perouse established an observatory upon one of the islands in the bay, and set up tents for the sail makers and smiths. Although these posts were most carefully watched, the natives, gliding along the ground like snakes, scarcely stirring a leaf, managed in spite of our sentinels to commit various thefts; and one night they were clever enough to enter the tent where MM. de Launston and Darbaud (who were in charge of the observatory) slept. They carried off a silver-mounted gun, as well as the clothes belonging to the two officers, who had placed them for safety under their pillows. They escaped the notice of a guard of twelve men, and the two officers were not even awakened. [Illustration: Typical native of the Port des Francais.] But now the stay of the expedition in this port drew to a close. The soundings, surveys, plans, and astronomical observations were completed; but, before finally leaving the island, La Perouse wished thoroughly to explore the depths of the bay. He imagined that some large river must empty itself into it, which would enable him to penetrate into the interior; but in all the openings he entered he found only vast glaciers, which extended to the very summit of Fair Weather Mount. No accident or sickness marred the success which had so far attended the expedition.