The story of William Porphyry Benham is the story of a man who was led into adventure by an idea. It was an idea that took possession of his imagination quite early in life, it grew with him and changed with him, it interwove at last completely with his being. His story is its story. It was traceably germinating in the schoolboy; it was manifestly present in his mind at the very last moment of his adventurous life. He belonged to that fortunate minority who are independent of daily necessities, so that he was free to go about the world under its direction. It led him far. It led him into situations that bordered upon the fantastic, it made him ridiculous, it came near to making him sublime. And this idea of his was of such a nature that in several aspects he could document it. Its logic forced him to introspection and to the making of a record.