“Some kind of a seal, it looks like to me,” he said, after a careful scrutiny. “By Jove, I have it! It’s a secret sign, that’s what it is. The man for whom this is meant will undoubtedly recognize it.”

“I believe you have hit it,” exclaimed Chester.

“But how are we to know for whom it is intended?” said Hal. “It carries no address.”

“It is intended for Grand Duke Nicholas, commander-in-chief of the Russian armies,” replied Chester.

“How do you know that?”

“When I was wrestling with the prisoner he told me so,” was Chester’s reply.

“Well, then,” said Hal, “we know for whom it is intended, but what did the man give it to you for?”

“Well, he said that it must be delivered at all costs.”

“I hope he didn’t expect us to deliver it.”

“I guess he did though, or to see that it went on its way.”