They turned towards him, but it seemed that he was talking to himself.

He was, in fact, quietly taking measurements with a tape.

"Go on," said Cromarty briefly.

"Well, sir," said the superintendent. "The body was found near the door as I was pointing out, but it's a funny thing that a small table had been upset apparently, and Bisset tells us that that table stood near the window."

"Humph," grunted Simon sceptically.

"I'm quite sure of it, Mr. Rattar," said Bisset confidently, looking round from his work of measurement.

"No positive proof it was upset," said the lawyer.

"Did you find it upset?" asked Ned.

The lawyer shook his head emphatically and significantly, and the superintendent agreed.

"No, it was standing just where it is now near the wall."

"Then why do you think it was upset?"

"I picked up yon bits of sealing wax and yon piece of India rubber,"

said Bisset, looking round again. "I know they were on the wee table yesterday and I found them under the curtain in the morning and the table moved over to the wall. It follows that the table has been cowpit and then set up again in another place, and the other things on it put back. Is that not a fair deduction, sir?"

Ned nodded thoughtfully.

"Seems to me so," he said.

"It seems likely enough," the superintendent also agreed. "And if that's the case there would seem to have been some kind of ongoings near the window."

The Procurator Fiscal still seemed unconvinced.

"Nothing to go on. No proper evidence. It leads nowhere definitely," he said.

"Well now," continued the superintendent, "the question is--how did the murderer get into the room? The door was found locked and the key had been taken away, so whether he had locked it from the inside or the outside we can't tell. There's small chance of finding the key, I doubt, for a key's a thing easy hidden away."

"So he might have come in by the door and then left by the door and locked it after him," said Ned. "Or he might have come in by the window, locked the door and gone out by the window. Or he might have come in by the window and gone out by the door, locking it after him. Those are all the chances, aren't they?"

"Indeed, that seems to be them all," said the superintendent with a note of admiration for this clear exposition that seemed to indicate he was better himself at details than deductions.

"And now what about the window? Was that open or shut or what?"

"Shut but not snibbed, sir."

Ned turned to Bisset.

"Did Sir Reginald ever forget to snib the windows, supposing one happened to be open?"

"Practically never, sir."

"Last thing before he left the room, I suppose?" said the lawyer.

The butler hesitated.

"I suppose so, sir," he admitted, "but of course I was never here to see."

"Exactly!" said Simon. "Therefore one can draw no conclusions as to whether the window had been standing all the time just as it is now, or whether it had been opened and shut again from the outside; seeing that Sir Reginald was presumably killed before his usual time for looking to the windows."

"Wait a bit!" said Ned. "I was a.s.suming a window had been open. But were the windows fastened before Sir Reginald came in to sit here last thing?"

"Certainly they were that," said the butler emphatically.

"It was a mild night, he might have opened one himself," replied the Procurator Fiscal. "Or supposing the man had come in and left again by the door, what's more likely than that he unsnibbed the window to make people think he had come that way?"

"He would surely have left it wide open," objected Ned.

"Might have thought that too obvious," replied the lawyer, "or might have been afraid of the noise. Unsnibbing would be quite enough to suggest entry that way."

Ned turned his keen eye hard on him.

"What's your own theory then?"

"I've none," grunted Simon. "No definite evidence one way or the other.

Mere guesses are no use."

Ned walked to the window and looked at it carefully. Then he threw it up and looked out into the garden.

"Of course you've looked for footsteps underneath?" he asked.

"Naturally," said Simon. "But it's a hard gravel path and gra.s.s beyond.

One could fancy one saw traces, but no definite evidence."

The window was one of three together, with stone mullions between. They were long windows reaching down nearly to the level of the floor, so that entrance that way was extremely easy if one of them were open.

Cromarty got out and stood on the sill examining the middle sash.

Simon regarded him with a curious caustic look for a moment in his eye.

"Looking for finger marks?" he enquired.

"Yes," said Ned. "Did you look for them?"

For a single instant the Procurator Fiscal seemed a little taken aback.

Then he grunted with a half laugh:

"Don't believe much in them."

"Experienced criminals, that's been convicted before, frequently wears gloves for to prevent their finger prints being spotted," said the learned Bisset.

Mr. Rattar shot him a quick ambiguous glance, and then his eyes a.s.sumed their ordinary cold look and he said: