"When Rogers left us on his last journey into the ring, he gave into my keeping, unknown to you, this envelope." The Doctor held it up.
"He made me swear I would keep its existence secret from every living being, until the date marked upon it, at which time, in the event of his not having returned, it was to be opened. Look at it." The Doctor laid the envelope on the table.
"It is inscribed, as you see, 'To be opened by Dr. Frank Adams at 8 P. M. on September 4th, 1923.' For five years, gentlemen, I kept that envelope, knowing nothing of its contents and waiting for the moment when I might, with honor, open it. The struggle has been a hard one. Many times I have almost been able to persuade myself, in justice to our friend's safety—his very life, probably—that it would be best to disregard his instructions. But I did not; I waited until the date set and then, a little more than a month ago, alone in my office, I opened the envelope."
The Doctor leaned forward in his chair and shuffled the papers he held in his hand. His three friends sat tense, waiting.
"The envelope contained these papers. Among them is a letter in which I am directed to explain everything to you as soon as I succeed in doing certain other things. Those things I have now accomplished. So I have sent for you. I'll read you the letter first."
No one spoke when the Doctor paused. The Banker drew a long breath. Then he bit the end off a fresh cigar and lit it with a shaking hand. The Doctor shifted his chair closer to the table under the light.
"The letter is dated September 14th, 1918. It begins: 'This will be read at 8 P. M. on September 4th, 1923, by Dr. Frank Adams with no one else present. If the envelope has been opened by him previous to that date I request him to read no further. If it has fallen into other hands than his I can only hope that the reader will immediately destroy it unread.'" The Doctor paused an instant, then went on.
"Gentlemen, we are approaching the most important events of our lives. An extraordinary duty—a tremendous responsibility, rests with us, of all the millions of people on this earth. I ask that you listen most carefully."
His admonition was quite unnecessary, for no one could have been more intent than the three men silently facing him.
The Doctor continued reading: "'From Dr. Frank Adams, I exact the following oath, before he reads further. You, Dr. Adams, will divulge to no one, for a period of thirty days, the formulas set down in these papers; you will follow implicitly the directions given you; you will do nothing that is not expressly stated here. Should you be unable to carry out these directions, you will destroy this letter and the formulas, and tell no one of their ever having been in existence. I must have your oath, Dr. Adams, before you proceed further.'"