At a period when every geographical feature of the river Indus and its outlets or tributaries may be considered of interest, the following reports on that peculiar branch called the Narra, which, leaving the main stream on the western bank, a little below Sukkur, debouches at Sehwan, are offered for consideration. The first of these reports was drawn up by the author, in consequence of his being one of the first Europeans who had pursued this route; and the second by the assistant-surgeon attached to the steamer, which was sent experimentally to test its value in avoiding the delays and strong currents of the main stream during certain portions of the year; the result was so far satisfactory, that with a well adapted boat it is evident the voyage over this distance might be made in about sixty hours, or one-third of the time consumed on the river itself. The great feature and natural curiosity of this portion of the Indus, however, is the great lake Manchur, an expanse of waste water of the mighty Indus, which is formed by the main streams rushing into it from north and east, and which is probably 200 square miles in extent. The greater portion of the surface of this lake is covered with the lotus plant, in all its beauty and luxuriance, and it is perhaps impossible to imagine a more delightful voyage than across this magnificent expanse of water, the scene being much enlivened by the great number of fishing boats; a considerable portion of the poorer Sindhian population finding their homes and subsistence in this locality.