In the early days of the epidemic Katherine heard one morning that Elsie Sherman had just been stricken. She had seen little of Elsie during the last few weeks; the strain of their relation was too great to permit the old pleasure in one another’s company; but at this news she hastened to Elsie’s bedside. Her arrival was a God-send to the worn and hurried Doctor Woods, who had just been called in. She telegraphed to Indianapolis for a nurse; she telegraphed to a sister of Doctor Sherman to come; and she herself undertook the care of Elsie until the nurse should arrive.

“What do you think of her case, Doctor?” she asked anxiously when Doctor Woods dropped in again later in the day.

He shook his head.

“Mrs. Sherman is very frail.”

“Then you think——”

“I’m afraid it will be a hard fight. I think we’d better send for her husband.”

Despite her sympathy for Elsie, Katherine thrilled with the possibility suggested by the doctor’s words. Here was a situation that should bring Doctor Sherman out of his hiding, if anything could bring him. Once home, and unnerved by the sight of his wife precariously balanced between life and death, she was certain that he would break down and confess whatever he might know.

She asked Elsie for her husband’s whereabouts, but Elsie answered that she had had letters but that he had never given an address. Katherine at once determined to see Blake, and demand to know where Doctor Sherman was; and after the nurse arrived on an afternoon train, she set out for Blake’s office.

But Blake was out, and his return was not expected for an hour. To fill in the time, Katherine paid a visit to her father in the jail. She told him of Elsie’s illness, and told at greater length than she had yet had chance to do about the epidemic. In his turn he talked to her about the fever’s causes; and when she left the jail and returned to Blake’s office an idea far greater than merely asking Doctor Sherman’s whereabouts was in her mind.