For months, hundreds of men had been engaged in the construction of a huge dam designed to control the floodwaters of the Snake River and divert them to the useful purpose of irrigation. At the time our story opens, it was shortly after dark and work for the day had ceased. Butler, the superintendent of construction was seated alone in his office. He gave the impression of waiting for something, and when there was a rapping at the window, he jumped nervously to his feet...