"I guess you're on to my weak spot, all right, partner," he hastened to say in the boldest manner possible. "But really and truly, I have got some things I want to do, though of course they could be postponed if absolutely necessary. Some time perhaps you'll be having my plebeian dish over at your house; then try asking me if you dare."
He turned up about seven o'clock, just after darkness had set in, for the moon was getting very old now, and a late riser. The two boys sat in Hugh's den for considerably more than an hour, talking and planning. Both showed vague signs of nervousness, however. Thad in particular frequently walked over to a window and looked out. Doubtless he was thinking what a joke on them it would be if the marauders came much earlier than expected, when all their fine work with that tub of icy water would go for naught.
"Hadn't we better be making a start, Hugh?" he finally asked. "Don't forget we have to handle that ice first, and get things ready."
"All right," the other replied. "We'll make for the rabbit hutch, and here's hoping that we don't have a long watch all for nothing."
The ice was soon procured. Hugh cracked it in rather small pieces. He did this for two good reasons. First it would chill the water more speedily when in this condition; then again the chances of knocking one of the interlopers on the head with a heavy lump of ice falling quite some distance would be obviated. Hugh did not intend that this prank should end in a tragedy, if he could help it.
When everything had been arranged to suit Hugh, the boys retired within the rabbit hutch, and the door was fastened with the padlock, which Hugh could undo when the time came by leaning far out of the open window.
They took up their positions in the place already selected, and wrapped in complete darkness awaited coming events. The time passed very slowly, but since they had dressed warmly, they did not suffer from the chilly air, for it was only April, and the warmth of summer still far distant.
Nine o'clock struck. Bless that town clock, by means of which they could tell the hour; for Thad was beginning to believe it much later than it really was. He yawned, and stretched a bit, shifting his position. Then Hugh touched him on the arm, and his low whisper came in Thad's very ear.
"Sh! something stirring outside!"
Thad had heard it, too. Either the night wind had arisen; and was sighing through the branches of the big oak that hung partly over the rabbit hutch, or else some living object had moved; for what the boys heard as they crouched there quivering with suspense and anticipated victory was certainly in the nature of a creeping sound.