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The Sounding of the Call.
When Buck earned sixteen hundred dollars in five minutes for John Thornton, he made it possible for his master to pay off certain debts and to journey with his partners into the East after a fabled lost mine, the history of which was as old as the history of the country.

Many men had sought it; few had found it; and more than a few there were who had never returned from the quest.

This lost mine was steeped in tragedy and shrouded in mystery.

No one knew of the first man.