On the battlefield side Bevis could not go close to the shore because it was lined with a band of weeds; and on the other there were willow bushes in the water, so that the actual channel was less than the distance from bank to bank. Each tack only gained a few yards, so that they crossed and recrossed nearly twenty times before they began to get through the strait. The sails were wet now, and drew the better; they worked in silence, but without a word, each had the same thought. “It will do now,” said Mark. “Once more,” said Bevis. “Now,” said Mark, as they had come round. “Yes!” From the westward shore Bevis kept her close to the wind, and as the water opened out, he steered for Fir-Tree Gulf. He calculated that he should just clear the stony promontory. Against the rocky wall the waves dashed and rose up high above it, the spray was carried over the bank and into the quarry. The sandbank or islet in front was concealed, the water running over it, but its site was marked by boiling surge. The waves broke over it, and then met other waves thrown back from the wall; charging each other, they sprang up in pointed tips, which parted and fell. Over the grassy bank above rolled brown froth, which was then lifted and blown away. This was one of those places where the wind always seems to blow with greater force. In a gale from the southwest it was difficult to walk along the bank, and even now with only a light breeze the waves ran at the stony point as if they were mad. Bevis steered between Scylla and Charybdis, keeping a little nearer the sunken islet this time, the waves roared and broke on each side of them, froth caught against the sails, the boat shook as the reflux swept back and met the oncoming current; the rocky wall seemed to fly by, and in an instant they were past and in the gulf. Hauling into the wind, the boat shot out from the receding shore, and as they approached the firs they were already half across to the Nile. Returning, they had now a broad and splendid sea to sail in, and this tack took them up so far that next time they were outside the gulf. It was really sailing now, long tacks, or “legs,” edging aslant up into the wind, and leaving the quarry far behind. “It’s splendid,” said Mark. “Let me steer now.” Bevis agreed, and Mark crept aft on hands and knees, anxious not to disturb the trim of the boat; Bevis went forward and took his place in the same manner, buttoning his jacket and turning up his collar. Mark steered quite as well. Bevis had learned how to work the boat, to coax her, from the boat and the sails themselves. Mark had learned from Bevis, and much quicker. It requires time, continued observation, and keenest perception to learn from nature. When one has thus acquired the art, others can learn from him in a short while and easily. Mark steered and handled the sheet, and brought her round as handily as if he had been at it all the time.