They left Boston by stage and one evening in early April, traveling afoot, they saw the familiar boneheads around the pasture lands above Albany where the farmers had crowned their fence stakes with the skeleton heads of deer, moose, sheep and cattle in which birds had the habit of building their nests. It had been thawing for days, but the night had fallen clear and cold. They had stopped at the house of a settler some miles northeast of Albany to get a sled load of Solomon's pelts which had been stretched and hung there. Weary of the brittle snow, they took to the river a mile or so above the little city, Solomon hauling his sled. Jack had put on the new skates which he had bought in Bennington where they had gone for a visit with old friends. They were out on the clear ice, far from either shore, when they heard an alarming peal of "river thunder"--a name which Binkus applied to a curious phenomenon often accompanied by great danger to those on the rotted roof of the Hudson. The hidden water had been swelling. Suddenly it had made a rip in the great ice vault a mile long with a noise like the explosion of a barrel of powder. The rip ran north and south about mid-stream. They were on the west sheet and felt it waver and subside till it had found a bearing on the river surface. "We must git off o' here quick," said Binkus. "She's goin' to break up." "Let me have the sled and as soon as I get going, you hop on," said Jack. The boy began skating straight toward the shore, drawing the sled and its load, Solomon kicking out behind with his spiked boots until they were well under way. They heard the east sheet breaking up before they had made half the distance to safe footing. Then their own began to crack into sections as big "as a ten-acre lot," Mr. Binkus said, "an' the noise was like a battle, but Jack kept a-goin' an' me settin' light an' my mind a-pushin' like a scairt deer." Water was flooding over the ice which had broken near shore, but the skater jumped the crack before it was wider than a man's hand and took the sled with him. They reached the river's edge before the ice began heaving and there the sloped snow had been wet and frozen to rocks and bushes, so they were able to make their way through it. "Now, we're even," said Solomon when they had hauled the sled up the river bank while he looked back at the ice now breaking and beginning to pile up, "I done you a favor an' you've done me one. It's my turn next." This was the third in the remarkable series of adventures which came to these men. They had a hearty welcome at the little house near The King's Arms, where they sat until midnight telling of their adventures. In the midst of it, Jack said to his father: "I heard a speaker say in Boston that the dragon's teeth had been sown. What does that mean?" "It means that war is coming," said John Irons. "We might as well get ready for it."