"It is, I confess, with considerable diffidence, that I approach the strange narrative which I am about to relate. The events which I purpose detailing are of so extraordinary a character that I am quite prepared to meet with an unusual amount of incredulity and scorn. I accept all such beforehand. I have, I trust, the literary courage to face unbelief. I have, after mature consideration resolved to narrate, in as simple and straightforward a manner as I can compass, some facts that passed under my observation, in the month of July last, and which, in the annals of the mysteries of physical science, are wholly unparalleled."