We placed the south point of Water Valley in latitude 15 degrees 13 3/4 minutes South and longitude 2 degrees 22 minutes West of Port Essington, variation one degree easterly.

Our tidal observation made the time of high-water, at the full and change of the moon, 9 o'clock, when the mean rise at springs was sixteen feet, and at neaps ten.

The duration of the flood-stream was seven hours, being two greater than the ebb.

The former ran 50 minutes after high-water, and the latter 30 minutes after low-water.

Before leaving Holdfast Reach, Lieutenant Emery observed one or two natives, opposite Water Valley, being the only ones that had been seen from the ship.