Martha shot a quick, inquiring glance at Katherine. The girl nodded in response.
"Yes, sir!" Mrs. Slawson answered promptly.
"Then, see that you charge your mind seriously with what you have undertaken. Your memory must be exact. Now, Miss Crewe——"
Katherine inclined her head, smiling faintly. But Martha noticed she was very pale.
"Your grandmother would like to know, from your own lips, the extent of your acquaintance with Dr. Ballard, the physician who has been in attendance on Madam Crewe since her late illness."
Katherine hung fire a moment, while the blood slowly mounted to her cheeks, her temples.
"My grandmother forbade me to have anything whatever to do with Dr. Ballard," she parried the question.
"Did you obey her injunction?—Attend, Mrs. Slawson!"
"No!"
"Why not?"