«Let's go,» Mason said.

Della got up from her chair, but Drake motioned her down with his hand, «Nix,» he said. «This is no place for ladies.»

«Phooey,» she said. «I know about the birds, the bees, the flowers and the underworld.»

«This is going to be tough,» Drake said.

Della Street looked appealingly to Perry Mason.

Mason deliberated a moment, then said, «Okay, come on, Della, but you're on your own… How are you fixed for protection, Paul?»

Drake pulled back his coat to show a gun in a shoulder holster.

«If the going gets tough,» he said, «we can flash my credentials and, if it comes to a real showdown, we can use this.»

«We're dealing with murder,» Mason said.

They carefully switched out the lights in the lawyer's private office, locked the door, and went down to Drake's car.

Drake drove down to skid row, which at this hour was a blaze of nighttime activity.

From time to time he looked dubiously at Della Street.

Drake finally found a parking place near the rooming house which was their destination.

Della, tucked in between the broad shoulders of Perry Mason and Paul Drake, was guided across the street along some thirty feet of sidewalk, then up a flight of stairs to a dimly lit little alcove where a counter held a plaque with the word OFFICE on it, and a bell.

Back of the counter were hooks containing various keys.

«Number five,» Drake said. «The key isn't on the hook, so we'll take a look.»

«He's not apt to be in, is he?» Della asked. «This is the period of high activity for skid row.»

«I think he is,» Drake said. «I think he's afraid to leave his room.»

They walked down a corridor, dark, smelly and sinister.

Drake located No. 5, pointed toward the underside of the door.

«There's a light,» he said.

Mason's knuckles tapped a peremptory message on the panels of the door.

For a moment there was no answer, then the voice of a man standing close to the door said, «Who is it?»

«Detective Drake,» Drake said.

«I don't know any dicks by the name of Drake.»

«I have something for you,» Drake said.

«That's what I'm afraid of.»

«You want me to stand here in the hall and tell it so everybody can hear it?»

«No, no.»

«Well then, let us in.»

«Who's the 'us'?»

«I have a girl with me,» Drake said, «and a friend.»

«Who's the girl?»

Della Street said, «My name is Street.»

«Well, go find yourself another alley, sister.»

Mason said, «All right, if that's the way you want it, that's the way it'll be. You'll pay the price. You wanted to get lost and the deal I have gives you a chance.»

«_You_ can do the getting lost,» the man's voice said. «I'm not opening the door for any crummy gag like this. If you want me to open up, get someone I know.»

Mason motioned to Paul Drake, said, «You and Della wait here in the corridor, Paul. If he comes out, nab him.»

«What do I do with him?»

«Hold him, one way or another. Push him back in the room. Put him under citizen's arrest if you have to.»

«For what?» Drake asked.

«Hit-and-run,» Mason said. «But I don't think he'll be out.»

Mason walked down the long, smelly corridor to a telephone booth which smelled of stale cigar smoke.

Mason dialed police headquarters. «Give me Homicide,» he said, when he had an answer.

A moment later when a voice said, «Hello, this is Homicide,» Mason said, «I have to get Lieutenant Tragg on a matter of the greatest importance. How long would it take to get a message through to him? This is Perry Mason talking.»

The voice at the other end of the line said, «Just a minute.»

A second and a half later Lieutenant Tragg's dry voice came over the wire. «What's the matter, Perry, you found another body?»

«Thank heavens you're there,» Mason said. «I'm really in luck.»

«You are, for a fact,» Tragg told him. «I just dropped in to see if there were any new developments on a case I am working on. What's the trouble?»

Mason said, «I want you to join me. I've got something big.»

«A corpse?»

«No corpse, not yet. There may be one later on.»

«Where are you?» Tragg asked.

Mason told him.

«Shucks,» Tragg said, «that's only a short distance from headquarters.»

«Will you join me?» Mason asked.

Tragg said, «Okay.»

«Bring a man with you,» Mason told him.

«Okay,» Tragg said, «I'll grab a police car and be there within a matter of minutes.»

«I'm waiting for you at the office at the head of the stairs,» Mason told him. «This is a walk-up rooming house, second floor only-over a bunch of hock shops and honkytonks.»

«I thought I knew the dump,» Tragg said. «We'll be there.»

Mason stood waiting by the phone booth.

Two men came up the stairs, paused at the office, looked furtively around them, saw Mason standing there, started toward him.

The lawyer moved a step or two forward.

The men looked at his height, at his shoulders, looked at each other, then wordlessly turned, walked back to the head of the stairs and went down to the street.

A few moments later, Tragg, accompanied by a uniformed officer, came to the head of the stairs, paused and looked up and down the corridor.

Mason came striding forward.

Tragg paused by the counter, waiting for him, looking at the lawyer with kindly, quizzical eyes.

«All right, Perry,» he said, «what is it this time? Here's your cat's-paw. Where's the chestnut you want pulled out of the fire?»

Mason said, «Room five.»

«How hot is the chestnut?»

«I don't know,» Mason said, «but once we get in and shake him down, I think we'll find the solution of the Lauretta Trent murder case.»

«You don't think we have it already?»

«I know you don't have it already,» Mason said.

Tragg sighed. «I could have saved myself a trip if I'd only been properly skeptical,» he said. «What's more, the office takes a dim view of our running around on the hunches of defense attorneys trying to undermine cases the district attorney is prosecuting in court.

«Played up in newspapers, it wouldn't make a very nice story, now, would it?»

«Have I ever left you in the middle of a story in the newspapers that didn't look good?» Mason asked.

«Not yet,» Tragg said. «I don't want you to start.»

«All right,» Mason told him, «you've come this far, come on down to room five.»

Tragg sighed, said to the officer, «Okay, we'll take a look. That's all we're doing, taking a look.»

Mason led the way down to where Paul Drake and Della Street were waiting.

«Well, well,» Tragg said, «we seem to have a quorum.»

Mason banged on the door again.

«Go away,» the voice inside said.

Mason said, «Lieutenant Tragg of Homicide and an officer.»

«You got a warrant?»

«We don't need a warrant,» Mason said. «We-«

«Now, just a minute,» Tragg interrupted, «I'll do my own talking. What's this all about?»

Mason said, «This man registered under the name of Canton Jasper at the Saint's Rest Motel. He's also the stoolie who gave the police the bum steer on the dope in Virginia Baxter's suitcase. He's waiting for police funds to get out of town.

«He's been a professional informer for the dope squad and-You want me to stay here and yell the whole business out in the corridors, Fisk?»

There was a sound of a bolt on the door; then a chair being moved. The door opened to the limit of a safety chain. Obsidian black eyes peered out anxiously, came to rest on the police officer's uniform, then looked at Tragg.

«Let me see your credentials,» he demanded.

Tragg slipped a leather container from his pocket, held it where the man could see it.

The man said, «Look up and down the corridor. Anybody there?»

«Not now,» Mason said, «but a couple of torpedoes came up a few minutes ago. They started down to your room and then turned back when they saw I was a witness.»