"Another matter," went on the miner, and this time he lowered his voice to a whisper as if afraid of being overheard. "These letters aren't so important as their answers will be."

"What do you mean?" asked Jack.

"I mean that we expect some legal documents by mail, after these letters have reached those for whom they are intended," answered the miner. "The replies will be very important, and I wouldn't want them to fall into the hands of those who are trying to get the property away from us.

"So if you'll just mention to your cousin to bear in mind when any letters like these come for me that they're important, and if you'll remember that yourself, Jack, why, we'll be much obliged to you."

"I sure will be on the watch," promised Jack. "They'll be registered, of course."

"Oh sure! But I don't imagine anything will happen to them. For no one can know exactly when they will come. Only be on the watch for them."

"I certainly will! Now if you'll give me those I'll put them in a safe place."

Mr. Argent handed over the missives, and Jack put them in his inside pocket, and then used a safety pin to close the opening.

"Safety first!" he exclaimed with a laugh.

"That's right," assented the miner.