"But I should say there won't be--just yet.
It's a queer business, isn't it--but, as I say, there's evidence against this fellow, and we must try to get him." He went out then and crossed the street to the doctor's house--while he was about it, he wanted to know all he could.

And with the doctor he stopped much longer than he had stopped at the bank, and when he left him he was puzzled.

For the doctor said to him what he had said to Cotherstone and to Bent and to the rest of the group in the wood--that whoever had strangled Kitely had had experience in that sort of grim work before--or else he was a sailorman who had expert knowledge of tying knots.

Now Mallalieu was by that time more certain than ever that Cotherstone was the murderer, and he felt sure that Cotherstone had no experience of that sort of thing.
"Done with a single twist and a turn!" he muttered to himself as he walked back to the police-station.

"Aye--aye!--that seems to show knowledge.