"To-night, then at eleven-thirty," said Burr, finally. "Be ready."
Allen nodded. Mrs. Baker accompanied Burr from the prison.
"You—you will let me be with you?" she begged.
"It is hardly necessary," said the professor.
"But I must. I must see Allen the moment he is free, to make sure he is all right. Then, I want to be able to take him away. I have a place in which we can hide, and as soon as he is rescued he must be taken out of sight."
"Very well," said Burr, shrugging. "It is immaterial to me, so long as you do not interfere with the course of the experiment. You must sit perfectly still, you must not speak until Allen stands before you and addresses you."
"Yes, I will obey you," she promised.
Mrs. Baker watched Professor Ramsey Burr eat his supper. Burr himself was not in the least perturbed; it was wonderful, she thought, that he could be so calm. To her, it was the great moment, the moment when her son would be saved from the jaws of death.
Jared carried a comfortable chair into the laboratory and she sat in it, quiet as a mouse, in one corner of the room.