he stepped over the dead body and entered the library. He closed the door behind him, went to the safe, which was still open, and took from the upper left-hand pigeon hole a package of papers. Then he closed the safe and turned the knob, probably mechanically, showing that he was a man accustomed to deal with keyless safes. He went to the desk and took from it the letter which Wing had just sealed and directed"
"To whom?" interrupted McManus.
"To the Governor, asking for an appointment for the following Thursday, the thirteenth."
McManus nodded and Trafford went on:
"Then he put out the light, raised the shade of one window to make sure the coast was clear, and returned the way he had come. In doing so, he closed the library door behind him and drew the outer door to until it was stopped by the body of the dead man. Thus, you see, with all his shrewdness, he made four mistakes; he closed and locked the safe; he put out the light; he closed the library door, and he attempted to close the outer door."
"How mistakes?" asked McManus.
