"There is a shower coming up over the island, Captain de Vaux," said Stebbins, touching his hat. "Coming, sure enough!--look yonder!"--exclaimed Harry, pointing eastward, where heavy clouds were now seen rising rapidly over the wood. "We shall have a shower, and something of a squall, I guess," added Stebbins. There could not indeed be much doubt of the fact, for a heavy shower now seemed advancing, with the sudden rapidity not unusual after very warm weather; the position of the bay, and a wooded bank having concealed its approach until close at hand. "We shall have a dead calm in ten minutes," said de Vaux; "I wish the Petrel was off." But still there seemed something going on in the garden; the woman and Sam were very busy, and Charlie and Smith had joined them. "They must see the shower coming up by this time!" exclaimed de Vaux. "There will be a squall and a sharp one, too," added Stebbins. The wind, which had prevailed steadily all the morning in a light, sultry breeze from the south, was now dying away; the sullen roll of distant thunder was heard, while here and there a sudden flash burst from a nearer cloud. "Thank Heaven, they are off at last!" cried de Vaux, who was watching the schooner with some anxiety. Harry and the two men were busy gathering together under cover of the shanty, the different articles scattered about, and among others Charlie's half-finished sketch. The sun was now obscured; light, detached clouds, looking heated and angry, were hurrying in advance with a low flight, while the heavens were half-covered by the threatening mass which came gathering in dark and heavy folds about the island. Suddenly the great body of vapour which had been hanging sullenly over the western horizon all the morning, now set in motion by a fresh current of air, began to rise with a slow movement, as if to meet the array advancing so eagerly from the opposite direction; it came onward steadily, with a higher and a wider sweep than the mass which was pouring immediately over the little bay. The landscape had hung out its storm-lights; the dark scowl of the approaching gust fell alike on wood, beach, and waters; the birds were wheeling about anxiously; the gulls and other water-fowl flying lower and lower, nearer and nearer to their favourite element; the land-birds hurrying hither and thither, seeking shelter among their native branches. But not a drop of rain had yet fallen; and the waves still came rolling in upon the sands with the measured, lulling sound of fair weather. The air from the south revived for a moment, sweeping in light, fitful puffs over the bay. Favoured by this last flickering current of the morning's breeze, the Petrel had succeeded in making her way half across the bay, though returning less steadily than she had gone on her errand an hour before. "Give us another puff or two, and she will yet be here before the squall," said de Vaux.