Mason said, «You might also give a little thought to what will happen if you don't report what you have found out and if there should be a fourth attack during which Mrs. Trent should die.»

«I've been pacing the floor thinking of that for the last hour,» Dr. Alton said. «I knew that you disapproved of the extent of the precautionary measures I had taken. You thought that I should at least have confided my suspicions to the nurse in charge and seen that-Oh, well, that's all water under the bridge now.

«Mason, I'm going out there. I'd like very, very much to have you along with me when I talk with my patient. I think I'm going to need professional reinforcements and before I get done, I may need an attorney. I want to have you there to substantiate the facts. I'll see that you're amply paid by Mrs. Trent. I'll make that my responsibility.»

«What's the address?» Mason asked.

«An imposing mansion on Alicia Drive, the number is twenty-one twelve. I'm going right out there. If I should get there first, I'll wait for you. If you get there, just park your car at the curb on the street and wait for me.

«Actually, there's a curved driveway going up to the front entrance, but the only place you could wait without attracting attention would be at the curb.»

«All right,» Mason told him. «Della Street, my secretary, and I are on the way out right now.»

«I'll probably beat you there,» Dr. Alton said. «I'll be parked at the curb.»

«Any idea of just how you are going about it?» Mason asked.

Dr. Alton said, «I've been overly optimistic long enough. Perhaps I should say, I've been a coward.»

«You're going to tell her the whole thing?»

«Tell her the whole thing. Tell her that her life is in danger. Tell her that I have made a mistake in diagnosis. In short, I'm going to set off the whole chain reaction.»

«You know her,» Mason asked, «how will she take it?»

«I don't know her that well,» Dr. Alton said.

«Haven't you been treating her for quite a while?»

«I've been her physician for years,» Dr Alton said, «but I don't know her well enough to know how she'll take anything like this. No one does. She is very much of a law unto herself.»

«Sounds interesting,» Mason said.

«Probably interesting to you,» Dr. Alton told him, «but it's disastrous as far as I'm concerned.»

«Now, don't be too hard on yourself,» Mason said. «Physicians don't ordinarily expect homicidal poisoning, and the records show that virtually every case of arsenical poisoning was originally diagnosed by the physician in charge as a gastroenteric disturbance of considerable magnitude.»

«I know. I know,» Dr. Alton said. «You can make it easy on me, but I'm not going to. I'm going to face the music.»

«All right,» Mason told him, «I'll meet you there.»

The lawyer hung up; nodded to Della Street.

«Report to Paul Drake, Della. We're going out there. We can't let Dr. Alton face the music alone.»

Mason found Alicia Drive without difficulty; drove slowly along until the street lights showed an imposing white mansion on high ground to the right with a curved driveway leading up to the front.

A car was parked at the curb just before the entrance to the driveway and the parking lights were on. A figure could be seen silhouetted in the driver's seat.

Mason said, «Unless I'm mistaken, that will be Dr. Alton.»

The lawyer eased his car into the curb behind the other machine, and Dr. Alton almost instantly opened the door of his car and came walking back to Mason's side of the car.

«Well,» Dr. Alton said, «you made good time. Let's go.»

«Take both cars in the driveway?» Mason asked.

«I think so. I'll lead the way; you follow me. There's a parking place in front. That is, it's wide enough for three cars and you just leave your car behind mine.»

«Let's go,» Mason told him.

Dr. Alton hesitated a moment, squared his shoulders, marched grimly over to his automobile, started the motor, switched on the headlights and led the way up the curving drive.

Mason followed behind him, parked his car, walked around to help Della out; then led her up the steps to the spacious stone landing.

Dr. Alton pressed the bell button.

Apparently Alton had expected a servant to open the door. He recoiled noticeably when a chunky, blue-eyed man in his middle fifties stood in the doorway.

«Why, hello, Doc,» the man said. And then added almost instantly, «What's the matter? Anything wrong?»

Dr. Alton said with dignity, «I happened to be driving by… I decided to drop in to see Mrs. Trent.»

The man turned speculative blue eyes on Perry Mason and Della Street.

«And these people?» he asked.

Dr. Alton, evidently upset by the meeting, apparently did not intend to perform introductions.

«They are with me,» he said shortly, and started through the door.

Mason took Della Street's arm, guided her into the reception hallway, smiled affably but impersonally and started to follow Dr. Alton up a sweeping staircase.

«Hey, wait a minute!» the man said. «Hey, what is this?»

Dr. Alton turned, frowned, reached a decision. «I have asked these people-«

«Why, this is Perry Mason, the lawyer!» the man interrupted. «I've seen his picture dozens of times.»

Dr. Alton, with close-clipped professional efficiency, said, «Quite right. That is Mr. Perry Mason and, in case you're interested, the young woman with him is Miss Della Street, his secretary. I want Mr. Mason to talk with Mrs. Trent.»

Then, after a barely perceptible hesitation, he said, «This is Mr. Boring Briggs, a brother-in-law of my patient.»

Briggs didn't even acknowledge the introduction.

«Say, what is this?» he asked. «You folks making out a will or something? What's happened? Lauretta hasn't had another one of her spells, has she?»

Dr. Alton said, «I would prefer to let Mrs. Trent give you the information, but if it will relieve your mind any, Mr. Mason is with me. Mrs. Trent didn't send for him.»

«Well, don't be so crusty about it,» Briggs said. «I naturally felt a little alarm. I've been out. Just got back a few minutes ago, and when I find a doctor and a lawyer coming out to the house at this hour of the night-well, I felt I was entitled to a little information, that's all.»

«We'll go on up,» Dr. Alton said with formal dignity. «Right this way, please.»

The physician indicated the stairway with a sweep of his arm and climbed the stairs.

Mason and Della Street followed a tread behind.

Briggs stood at the foot of the stairs and watched them go up, his expression one of frowning contemplation.

Dr. Alton reached the head of the stairs, started down the corridor with long strides. Then slowed perceptibly for a moment just before coming to a door where he knocked.

A woman opened the door.

This time Dr. Alton performed the introductions. «Miss Anna Fritch,» he said. «Trained nurse.

«Miss Fritch, this is Miss Della Street, Perry Mason's secretary and Mr. Perry Mason, the attorney.»

Her eyes widened. «Why, how do you do? How do you do?» she said.

Dr. Alton pushed his way into the room; held the door open for Della Street and Perry Mason. «How's the patient?» he asked.

The nurse's eyes met his. She lowered her voice and said, «She's gone.»

Dr. Alton's face was apprehensive. «You mean she's-«

«No, no,» the nurse hastened to explain, «she is out somewhere.»

Dr. Alton frowned. «I told you to take precautions about her diet and-«

«Why, certainly,» the nurse said, «I put it on the chart. She had dry toast which I fixed myself on an electric toaster and two soft-boiled eggs which I cracked myself. There was no seasoning at all. I'm afraid I may have gone to extremes. I insisted she eat the eggs without salt and I told her that you didn't want her to have any seasoning tonight.»