Without entering the town, I lost no time in putting off to sea in my little Arab craft. At first we made little headway, but after noon a fresh breeze came from the north-east, which continued all night, so that by the following morning, after a voyage of nearly 100 miles in twenty hours, we slackened sail under the mountains which I had previously visited, in lat. 21° N. The Nubian coast was almost close in front of us. A very primitive kind of compass enabled us to steer to this goal. I was glad to find that no water had reached my baggage, for in the heavy sea the boat had rolled and pitched considerably. We ran along the coast, and each familiar scene revived in me pleasant memories of my former journey, which had been unmarred by a single trouble. Close in view was Cape Roway, where the formation of a lagoon had developed natural salt-works, from which is obtained the salt for the consumption at Djidda, and for export to India. The salt, however, is only secured during the eight hottest months of the year, when the Red Sea is reduced to its lowest level, two or three feet below its altitude in the winter. The only explanation of this phenomenon seems to be the prevalent direction of the wind taken in connection with the position of the water. The bearings of the sea are such that the wind drives the waves with full force towards the Straits of Mandeb, the narrowness of which retards the outflow of the water and produces an immense evaporation. [Sidenote: SUBMARINE MEADOW.] The flat shore between the mountains and the sea with its coral reefs was hidden from our view. A green carpet of samphire covered the coast for miles along the land. This botanically may be represented as coming under the genus Suæda, the name of which is imitated from the Arab “sued,” the original of our “soda.” This plant has long been turned to a profitable account, and to this day Arab boats may be seen about the coast, engaged in the procuring and preserving of it. Rising directly out of the water close to the shore grow in patches great clusters of Avicennia, so abundant in tropical seas, the beautiful laurel-leaf of which forms a dazzling contrast to the bare brown of the mainland. Over considerable tracts at the depth of thirty feet the sea bottom resembles a submarine meadow, rich with every species of sea-grass: in these, turtles and dujongs, which are so numerous in this part of the Red Sea, find their pasture land. It must be a very protracted business for these cumbrous creatures to get their sustenance, bit by bit, from these tender leaflets; but they have time enough and nothing else to do.