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.

In tracing out the approach to Bligh’s Farewell, you will be led to examine the southern face of New Guinea as far as Cape Valsche; but after verifying the position of this point, it will be prudent to quit the shores of that island, and not to meddle with any part of it over which the Dutch claim jurisdiction.

When you have arrived at this distant point, the south-east monsoon will probably render it necessary to repair to Port Essington for such supplies as may by previous arrangement have been sent there for you from Sydney; or perhaps unforeseen events might render it more expedient to proceed for refreshments to some of the islands in the Arafura Sea, or it is possible to one of the Dutch settlements in Java.  And in either of these two latter cases you should make a complete survey of the island to which you have proceeded, or you should select any one of the eastern passages from Bally to Floris most convenient to the object you have in view, and then lay it down with precision.  Of the many well-known passages between the innumerable islands of that great Archipelago, there is not one which has ever been charted with plausible accuracy; and it cannot be too strongly impressed on your mind that hydrography is better served by one accurate chart than by ten approximate sketches.