The Doctor's voice died away, and he laid the papers on the table.
"Gentlemen," he went on, "later on in the letter I am directed to consult with you three, setting before you this whole matter. But before I do so I must exact a similar oath from each of you. I must have your word of honor, gentlemen, that you will not attempt to transgress the instructions given us, and that you will never, by word or action, allow a suggestion of what passes between us here in this room to-night, to reach any other person. Have I your promise?"
Each of his three hearers found voice to agree. The Banker's face was very red, and he mopped his forehead nervously with his handkerchief.
The Doctor picked up the papers. "The letter goes on: 'I am about to venture back into the unknown world of the ring. What will befall me there I cannot foretell. If by September 4th, 1923, I have not returned, or no other mortal has come out of the ring, it is my desire that you and the three gentlemen with you at the time of my departure, use this discovery of mine for the benefit of humanity in your world, or the world in the ring, exactly as I myself would have used it were I there.
"'Should the European war be in progress at that time, I direct that you four throw your power on the side of the United States for the defeat of the Central Powers. That you will be able to accomplish that defeat I cannot doubt.
"'If, on September 4th, 1923, the United States is formally at peace with the powers of the world, you are forbidden to use these chemicals for any purpose other than joining me in the world of the ring. If any among you wish to make the venture, which I hope may be the case, I request that you do so.
"'Among these pages you will find a list of fourteen chemicals to be used by Dr. Frank Adams during the month following September 4, 1923, for the compounding of my powders. Seven of these chemicals (marked A), are employed in the drug used to diminish bodily size. Those seven marked B are for the drug of opposite action.
"'You will find here a separate description of each chemical. Nine are well known and fairly common. Dr. Adams will be able to purchase each of them separately without difficulty. Three others will have to be especially compounded and I have so stated in the directions for each of them. Dr. Adams can have them prepared by any large chemical manufacturer; I suggest that he have not more than one of them compounded by the same company.
"'The two remaining chemicals must be prepared by Dr. Adams personally. Their preparation, while intricate, demands no complicated or extensive apparatus. I have tried to explain thoroughly the making of these two chemicals, and I believe no insurmountable obstacle will be met in completing them.
"'When Dr. Adams has the specified quantities of each of these fourteen chemicals in his possession, he will proceed according to my further directions to compound the two drugs. If he is successful in making these drugs, I direct that he make known to the three other men referred to, the contents of this letter, after first exacting an oath from each that its provisions will be carried out.