Before noon the derelict sank spluttering into the summer sea, and only a few blackened timbers were left to mark the spot where she had gone down.

A few days after this the wind fell and fell, until it was a dead calm.

Once more the sea was like molten lead, and its surface glazed and glassy, but never a bird was to be seen, and for more than a week not a cloud was in the sky as big as a man’s hand. Nor was the motion of the ship appreciable. By day the sun shone warm enough, but at night the stars far in the southern sky shone green and yellow through a strange, dry haze.

On Saturday night Tandy as usual gave orders to splice the main-brace. He, and Halcott also, loved the real old Saturday nights at sea, of the poet Dibdin’s days. And hitherto, in fair weather or in foul, these had been kept up with truly British mirth and glee.

There was no rejoicing, however, on this particular evening, for two of the hands lay prostrate on deck. Halcott himself ministered to them, sailor fashion. First he got them placed in hammocks swung under a screen-berth on deck. This was for the sake of the fresh air, and herein he showed his wisdom.

Then he took a camp-stool and sat down near them to consider their symptoms. But these puzzled him; for while one complained of fierce heat, with headache, and his eyes were glazed and sparkling, the other was shivering and blue with cold. He had no pain except cramps in his legs and back, which caused him an agony so acute that he screamed aloud every time they came on.

Halcott went aft to study. He studied best when walking on his quarterdeck. Hardly knowing what he did, he picked up a bone that honest Bob had been dining off, and threw it into the sea. There was still light enough to see, and the man at the wheel looked languidly astern. When three monster sharks dived, nose on, towards the bone, he looked up into the captain’s face.

“Seen them before?” said Halcott, who was himself superstitious.

“Bless ye, yes, sir. It’s just four days since they began to keep watch, and there they be again. Ah, sir! it ain’t ham-bones they’s a-lookin’ arter. They’ll soon get the kind o’ meat they likes best.”

“What mean you, Durdley?”