In the general and searching examination of those parts of the Coral Sea which are likely to be traversed by ships steering for Torres Strait, you will be obliged to regulate your movements by the periodic changes of the weather and monsoons--probably beginning to windward, and dropping gently to leeward by close and well-arranged traverses, and by spreading out your three vessels to a convenient distance apart. This great expanse of sea, which may be said to stretch from Lord Howe's Island to New Caledonia and to the Louisiade, would no doubt require many years work in order to accomplish that object; but, by dividing it into definite zones or squares, and by fully sifting those which you may undertake, a certain quantity of distinct knowledge will be gained. Navigators in crossing those zones will then be sure of their safety, and future surveyors will know exactly on what parts to expend their labours. In carefully exploring the northernmost, and apparently the safest entrance from the Pacific, which may be called Bligh's Channel, you will connect the islands with a survey of the coast of New Guinea, as well as with the edge of the Warrior Reef, and as there are throughout moderate soundings, you will probably be able to draw up such clear directions as will enable the mariner to use it in moderate weather by night, and to beat through it at all times. Characteristic views of the coast and hills of New Guinea, as well as of each island, both from the eastward and westward, will greatly assist him by the immediate certainty of his landfall, and will also materially add to your means of giving proper marks and bearings for avoiding the dangers. In Torres Strait you will find much to do--not only has a new rock been discovered in the middle of the Endeavour Channel, but the water in its western opening is only four and a half fathoms, and there seems no reason for not believing that Prince of Wales Channel is safer, easier, and more direct. But before we can decide upon that point, an accurate survey must be made of it, throughout its length and breadth, including the adjacent islands, and showing their anchorages and watering-places, as well as the nature of the soil, and the kind of timber they produce, along with a full investigation of the tides. The connection of that Strait with Bligh's Farewell should also be examined, for many circumstances may render it highly necessary that the Admiralty should be made aware of what means there are to pass from one ocean to the other, without being observed from Cape York. On this latter Cape Government have for some time contemplated a station, and it will therefore be very desirable to fix upon a convenient but secure anchorage in its neighbourhood. Our latest surveys do not show much promise of finding such a port; but, perhaps, inside the reefs beyond Peak Point, or more likely between Albany Island and the main, a snug place may be discovered for that purpose.