"I am not so sure about that," observed Dick; "caterpillars have been known to be frozen quite stiff, and to all appearance lifeless, yet they revive when they are warmed."

"Well," said Frank, "I tell you what we will do. We will dig them out, and put them into water in the house, and give them a chance."

They did so, and five of the perch, including the biggest and the smallest, came to life, and were subsequently restored to the broad.

One day a rapid thaw set in, and the ice was covered with a thin layer of water. During the night, however, the wind suddenly changed, and this layer of water froze so quickly, that it held fast by the feet many water-fowl which had been resting on the ice.

When the boys went down to the ice in the morning, they saw here and there a dead or dying water-hen or coot thus made captive, and surrounded by a group of the hooded crows, those grey-backed crows which in the winter-time are so common in Norfolk, and the rapacious birds were attacking and eating the poor held-fast water-fowl.

The crowning achievement of the winter was this: They broke the Swan free, and got her on to the ice; then they supported her on some runners, like large skate irons, made by the village blacksmith, and put on ordinary skates on each rudder to get steerage power, and so constructed with great ease an ice-ship after the fashion of those used in some parts of Canada. With this they sped over the ice at a far quicker rate than they had ever sailed upon the water, and they could steer her tolerably close to the wind. This amusement superseded the skating until the ice melted away, and the Swan once more floated on the water and sailed in her legitimate manner.



CHAPTER XXXVIII.

The Thaw.—Cromer.—Prehistoric Remains.

The thaw was accompanied by torrents of rain for more than a week. At the end of that time the boys were sitting in the boat-house making up their Note-book, when Mr. Meredith entered and said to them,—