July 4.—Whilst writing in my tent this evening, my attention was attracted by the notes of swans, and upon going out I perceived a flight of several of the black species coming up from the southward; when they had got over the tents, they appeared to be alarmed and wheeled to the eastward, but soon returning, they took a nearly due northerly course. This was encouraging for us, and augured well for the existence of some considerable body of water inland, but we hoped and expected that a few days would perhaps give us a clue to the object of their flight.