"Is it possible for him to succeed?"
"Quite possible, Rob, in spite of all our precautions. I feel in my very bones that to-night he will put forth a supreme effort."
A bell rang.
"I think," continued the doctor, "that this is Myra. She must get all the sleep she can, during the afternoon; for to-night I have determined that she, and you, and I, must not think of sleep, but must remain together, here in the library. We must not lose sight of one another—you understand?"
"I am glad that you have proposed it!" cried Robert Cairn eagerly, "I, too, feel that we have come to a critical moment in the contest."
"To-night," continued the doctor, "I shall be prepared to take certain steps. My preparations will occupy me throughout the rest of to-day."