Bruce having determined to attempt making a survey of the Red Sea down to the Straits of Babelmandel (which means the gate of affliction), took passages for himself and his party in a vessel that was shortly to be ready to receive him. The rais or captain was thought to be a saint; and he gravely assured Bruce, that any rock which stood in the way of his vessel would either jump aside, or else turn quite soft like a sponge. Previous to sailing with this man, Bruce embarked in a small boat, the planks of which, instead of being nailed, were sewn together; and, with the assistance of a sort of straw mattress as a sail, he departed on the 14th of March from the harbour of Cosseir, with an Arab guide, to go to Gibel Zurmud, the emerald mines described by Pliny and other writers. On the 16th he landed on a desert point, and at last came to the foot of these mountains. Inquiring of his guide the name of the spot, the fellow told him it was called "Saiel." "They are never," says Bruce, "at a loss for a name; and those who do not understand the language always believe them. He knew not the name of the place, and perhaps it had no name; but he called it Saiel, which signifies a male acacia-tree, merely because he saw one growing there." Near the foot of the mountain Bruce found five small pits or shafts, from which the ancients are supposed to have drawn emeralds; and then, without having seen a living creature of any sort, he returned to his boat, and proceeded to the islands of Gibel Macowar, to one of which he gave his own name. He was anxious to have sailed still farther towards the south; but signs of an approaching storm obliged him to turn and make for Cosseir. A most violent tempest of wind and rain overtook them; and the rais being completely overcome by fear, Bruce, unable to lower the yard, proposed to cut the straw mainsail to pieces. The rais, terrified at the storm, instantly turned towards Bruce with clasped hands and uplifted eyes, and began muttering to him something about the mercy and merits of Sidi Ali el Genowi. "Confound Sidi Ali el Genowi," said Bruce, "you beast, cannot you give me a rational answer?" and, getting the mainsail in his arms, with a large knife he cut it into shreds. On the 19th of March, a little before sunset, they reached the harbour of Cosseir, where they learned that three vessels had perished in the night, with all their hands.