And again, as darkness came on, we were in much uncertainty with regard to our ship's position. Ahead of us we saw a group of small islands which, we concluded, must be the "Seven Brothers" lying just at the entrance of the Straits. In truth, however, these were the Arabian mountains, whose highest peaks rose into view just above the horizon, a fact which we did not discover until we came in sight of the Perim revolving light. This gave us a good fixed point from which to direct our further course. Naturally, as we approached the Straits, all hands were on deck. Everyone was keeping a sharp lookout, for our only hope of safety lay in the keenness of our observation. The ship's lights were closely screened. The officers and petty officers were given orders to make continual rounds through the vessel to see to it that not a single ray of light escaped to reveal our presence, for the Chinese crew of the _Choising_ had little appreciation of the importance of this precaution. Whether I should sail with or without lights had been a question to which I had given much careful thought. If I calmly proceeded with all lights showing, just as any ordinary merchantman would, it might chance that none of the English patrol ships would hold me up, as it was not at all likely that so small a merchant ship as the _Choising_ would be regarded with suspicion. A ship sailing with screened lights would, on the contrary, become an object of suspicion to any one who should discover her. Nevertheless, in the end, I decided to have the lights screened. The Strait of Bab-el-Mandeb is a very narrow water-way. I hugged the African shore as closely as possible, to take advantage of the darker horizon there, and also because the shore afforded a dark background for the ship. But in spite of all this exercise of caution, we got so near to the revolving light at Perim that its intermittent ray fell upon us like a search-light, illuminating us for seconds at a time. Moreover, we could see two English warships lying just outside of Perim, and they were signaling to each other in Morse code. During that night's most anxious half hour we muttered many a bitter imprecation upon our engine that at best could make no more than seven and a half miles. But fortune favored us; the Englishmen did not discover us. Perhaps none of the small patrol boats upon which I had reckoned were abroad, for there was a stiff breeze blowing, and the sea was running high. At the end of two trying hours we had got to where we could consider ourselves as safely "through."