Traces of the visits of Malays to this part of Australia were found in the form of fragments of pottery, bamboo basket-work, and blue cotton rags, as well as a wooden anchor and three boat rudders. The Cape Maria of Dutch charts was found to be an island, which received the name of Maria Island. In Blue Mud Bay, Morgan, the master's mate, was speared by a native, and died. A seaman shot another native in revenge, and Flinders was "much concerned" and "greatly displeased" about the occurrence. His policy throughout was to keep on pleasant terms with all natives, and to encourage them to look upon white men as friendly. Nothing that could annoy them was countenanced by him at any time. The incident was so unusual a departure from his experience on this voyage as to set him conjecturing that the natives might have had differences with Asiatic visitors, which led them to entertain a common enmity towards foreigners. Melville Bay, the best harbour near the gulf, was discovered on February 12th, and on the 17th the Investigator moved out of the gulf and steered along the north coast of Australia. Six Malay vessels were sighted on the same day. They hung out white flags as the English ship approached and displayed her colours; and the chief of one of them came on board. It was found that sixty prows from Macassar were at this time on the north coast, in several divisions; they were vessels of about twenty-five tons, each carrying about twenty men; their principal business was searching for beche-de-mer, which was sold to the Chinese at Timor. Arnhem Bay was found marked, but not named, upon an old Dutch chart, and Flinders gave it the name it bears from the conviction that Tasman or some other navigator had previously explored it. In the early part of March he came to the conclusion that it would be imprudent to delay the return to Sydney any longer. Not only did the condition of the ship cause anxiety, but the health of the crew pointed to the urgency of quitting these tropical coasts. Mosquitoes, swarms of black flies, the debility induced by the moist heat of the climate, and the scarcity of nourishing food, made everybody on board anxious to return. Scorbutic ulcers broke out on Flinders' feet, so that he was no longer able to station himself at his customary observation-point, the mast-head. Nevertheless, though driven by sheer necessity, it was not without keen regret that he determined to sail away. "The accomplishment of the survey was, in fact," he said, "an object so near to my heart, that could I have foreseen the train of ills that were to follow the decay of the Investigator and prevent the survey being resumed, and had my existence depended upon the expression of a wish, I do not know that it would have received utterance; but Infinite Wisdom has, in infinite mercy, reserved the knowledge of futurity to itself."