rocks. Then, though he knew how dangerous it was, he followed the
light and found himself in along, dark tunnel."

"Oh," shuddered Leneli. "I could never be as brave as that. I
don't like dark places."

"Peter knew that a tunnel ran underneath the walls of the town
and that the other end of it opened by a trap-door into a stable
in Lucerne," went on the old man without noticing Leneli's
interruption, "and at once he saw that some traitor must have
told the Austrians of this secret passage. He crept closer and
closer to the group of men, until he was near enough to hear what
they said. You may be sure his blood ran cold in his veins when
he heard the voice of a man he knew, telling the Austrians just
how best they could capture the town! He knew that terrible
things would happen in Lucerne that night if the enemy ever
reached the other end of the tunnel, and at once made up his mind
that he must alarm the town. He dropped on his hands and knees
and was beginning to crawl back toward the entrance, when he
heard some one coming into the tunnel! He sprang to his feet and
tried to run past, but the passage was narrow, and he was caught
at once and dragged into the light."

"Oh! Oh!" gasped the Twins, breathless with excitement. "It
sounds just like a bad dream."

"It was no dream," said the old herdsman, "for when the traitor,
whose name was Jean de Malters, saw Peter, he was terribly angry.
'How did you come here,' he roared, in a voice that made the
earth shake.