During our walk we noticed the wild oat in great abundance. This valuable species of corn is then indigenous to this part of the world. Ere long, perhaps, the time will arrive when upon the coast, where now in native negligence it springs and dies, it may spread the white and glistening garment of cultivation--testify the existence--and promote the comfort of social life. The same seed was found near Hanover Bay, by Lieutenants Grey and Lushington, and throve exceedingly well in the soft and luxurious climate of the ever-verdant Mauritius. Leaving some presents in a conspicuous situation for the present rightful possessors of the island, whose temporary shelter we had obtained, we hastened back to the boats, and stood away to the eastward for the low land seen from the island, and crossed various narrow sandy ridges, nearly dry at low-water, and generally trending North and South, showing the direction of the stream by which they were formed, and at distances of 5, 7, 9, and 12 miles, in an East by South direction from Valentine Island; the soundings between them averaged from 7 to 9 fathoms. A favouring breeze from the south helped us halfway across to the point, from whence I hoped and believed we should hereafter date the first great event of the voyage; and then dying away, compelled us to take to the oars, with the thermometer at 110 degrees in the shade. INDICATIONS OF A RIVER. As we proceeded, several circumstances concurred to satisfy me that we were at length really approaching the mouth of a considerable river; large trees drifted past us with the ebbing tide, while each cast of the lead proved that we were gradually, though nearing the land, deepening the water. POINT TORMENT.