I was in for it now. I told him the whole story.

“By God,” he said, “that’s damned interesting. Fine idea for a murder.

Of course, any jury in the country would be only too ready to believe it

was accident. Tempting Providence, and all that. And unless your man was

fool enough to use the synthetic muscarine in its racemic form, you

know, I’m very much afraid he’s pulled it off. There’s a chance, of

course. They may not have gone further than that. Why didn’t you ask

Benson while you were about it?”

“I thought of doing so,” I admitted. “At least, I didn’t know about this

racemic business, but I thought there might be some way of telling the

artificial stuff from the real. But Harrison seemed satisfied——”

“He would be. I know these people. Wrapped up in their own subjects. An

engineer—_he_ ought to know something about molecular structure. But

no. He’s no occasion to study Organic, so it doesn’t occur to him that

there’s anything to know about it. The word of a first-year student at

Anthony’s is enough for him. You have more imagination. Why didn’t

you——?”

“I don’t know that I quite wanted to.”

“Let bad alone, eh? But damn it, it’s interesting. I say, what a scoop

for the papers, if it comes off! ‘First murder ever caught by the

polariscope.’ Better than Crippen and the wireless. Only they’ll have a

bit of a job explaining it. Now, look here, what are we going to do

about it? Who did the analysis?”

“Lubbock.”

“Oh, yes—Home Office man, of course. We’ll have to get on to him. It’s

chance if he’s kept the stuff by him. What? Oh, he has. That’s all right

then. We’ve only got to take a squint at it and then we shall know. I

mean, if the stuff really is racemic, we shall know. If not, we never

shall. What’s the time? Quarter-past eleven. No time like the present.

Here, driver!”

He thrust his head out of the window and gave an address in Woburn

Square.

“It’s all on our way, and Lubbock never goes to bed before midnight. I

know him well. He’ll be keen on this.”

His energy swept me up, feebly protesting, and in a few minutes’ time we

were standing on Sir James Lubbock’s doorstep, ringing the bell.

The door was opened by a manservant, of whom Waters inquired whether Sir

James was at home.

“No, sir. He is working late to-night, sir, at the Home Office. I think

it’s the arsenic case, sir.”

“Oh, of course. That’s luck for us, Munting. We’ll run down and catch

him there. You might give him a ring, Stevens, and say I’m coming down

to see him on an urgent matter. You know who I am?”

“Oh, yes, sir. Dr. Waters. Very good, sir. You’ll find him in the

laboratory, sir.”

“Right. We’d better hurry up, or we may just miss him.”

We plunged back into the taxi.

“Shall we find any difficulty in getting in?”

“Oh, no. I’ve been there before. We’re making very good time. Provided

he hadn’t started before Stevens got through to him, he’ll wait for us.

Ah! here we are.”

We drew up at a side door in the big Government building. After a short

colloquy with the man on duty, we were passed through. I stumbled at

Waters’ heels through a number of dreary corridors, till we fetched up

in a kind of small ante-room.

“I feel strongly persuaded,” I said, “that I am on a visit to the

dentist.”

“And you hope very much he’ll say there’s nothing to be done to you this

time. I, on the contrary, hope very much that it’s something malignant

and unusual. Have a fag.”

I accepted the fag. I tried to think of Harrison, perishing horribly in

his lonely shack, but instead I could only see Lathom with his hair

rumpled and his teeth set, painting with his usual careless brilliance.

I got the idea that God or Nature or Science or some other sinister and

powerful thing had set a trap for him, and that I was pushing him into

it. I thought it was ruthless of God or whoever it was. Pom, pomty; pom,

pomty; pom, pomty; pom, pomty—I was nervously humming something and I

couldn’t think what. Oh, yes— Haydn’s _Creation_—that bit, where the

kettle-drums thump so gently, so ruthlessly, on one

note—“And-the-spi-rit-of-God (pomty)

moved-upon-the-face-of-the-waters-(pom)”—only apparently it wasn’t the

Spirit of God, but an asymmetric molecule, which didn’t fit the rhythm.

Somebody was walking down the corridor, with a soft, muffled beat,

rather like kettle-drums. “Let there be light (pomty-pom) and there

was——”

The door opened.

I recognised Sir James Lubbock at once, of course, though now, in a

white overall and pair of crimson carpet slippers, he presented an

appearance less point-devise than he had done at the inquest. He greeted

Waters cordially and received my name with a faint look of puzzledom.

“Mr. Munting? Yes—let me see, haven’t we met before?”

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