"I guess we'll never forget that, will we, Hugh?" exclaimed Bob. "You don't mean that they tried to blow it up again?"
"Well, it looks so," said Mr. Cook. "One of the guards on the bridge this afternoon saw a man coming down the river in a rowboat. He called to him to halt, but the man kept right on. The guard challenged him three times, but as the man gave no answer he fired at him."
"Did he kill him?" demanded Bob excitedly.
"No," said Mr. Cook, "he didn't try to kill him. He just wanted to scare him, and when he fired the man jumped out of the boat into the water. The guard hurried down to the bank of the river, but the man had scrambled ashore and run off; you know it's quite a long distance from where the railroad tracks cross the bridge down to the water. The guard got a long pole and waded out into the river after the boat. He caught it finally and when he had hauled it ashore he found it was loaded with dynamite. Of course no one knows, but they think he planned to blow up the bridge."
"Whew!" exclaimed Hugh. "The man got away, you say?"
"Yes, unfortunately."
"Couldn't the guard see what he looked like?"
"Yes, he did see that, and here is the interesting part."
"What do you mean?"
"Why," said Mr. Cook, "the man was rather slight, weighing perhaps a hundred and fifty pounds and he had a close-cropped black mustache."