The extremity of the bay was not distinctly traced, but it is probable, upon examining it, that a fresh-water rivulet may be found; and there may be a communication with Edgecumbe Bay.
The Repulse Isles are of small size; they are surrounded by rocks, which do not extend more than a quarter of a mile from them.

The summit of the largest island is in latitude 20 degrees 37 minutes 5 seconds, and longitude 148 degrees 50 minutes 30 seconds.

Variation 6 degrees 15 minutes East.
Between Capes Conway and Hillsborough the flood-tide comes from the north-eastward, but is very irregular in the direction of the stream.

At an anchorage off the island near the latter cape the tide rose twelve feet, but close to the Repulse Isles, the rise was eighteen feet.

At the former place, the moon being full, high water took place at about three-quarters past ten o'clock; by an observation the next day at the latter, it was a quarter of an hour later: the maximum rate was about one and a half knot.
WHITSUNDAY PASSAGE, formed by the northern group of the Cumberland Islands, is from three to six miles wide, and, with the exception of a small patch or rocks within a quarter of a mile from Cape Conway, and a sandbank (that is probably dry, or nearly so at low water) off Round Head, is free from danger.