"What's the matter now?" asked Frank.
"Do you see the old man digging again?" inquired Bob.
"No," replied Sammy, "but don't let's tell the light-keeper nor Mr. Salina what we saw. Let's work this thing out ourselves. If there's any money in it we don't want to have to share it among too many people."
"Oh, you're always thinking of that!" laughed Bob.
"And another thing," said Frank. "Suppose that old man finds the pirate gold, Sammy, we couldn't ask him for a share in it, just because we spied on him, and saw him dig it, could we?"
"No," answered Sammy slowly, as he scratched his nose, which he always did when he was thinking deeply. "No, I s'pose not. But if we saw the old man digging, and he didn't find anything, there's nothing to prevent our going and digging near the same spots. He probably knows about where the gold is hid.
"But if we talk about this, and tell everybody, they'll all dig too, and they may find the treasure ahead of us."
"Say, you're as bad as when we went to Eagle Mountain," laughed Bob. "But go ahead. Have your way. We won't say anything until we've done a little more watching."
"That's all I ask," said Sammy.
"Then come on to the lighthouse," suggested Bob. "I'd like to see how the machinery works."
A little later they were knocking on the door of the small cottage built at the side of the big tower, in the top of which flashed the warning beacon.
"Come in," called a girl's voice, and the boys entered. They found themselves in a pleasant room, where sat John Floyd, the keeper of the light, and his wife and daughter. It was evidently the daughter, a girl of about twelve years,
