His mind was working swiftly.

He knew that behind an effort to appear calm Mercer was uneasy over what had happened.
"We mustn't let this get out, Mercer," he said.

"If Mooie should be badly hurt--should die, for instance--and it was discovered that you and I--" He knew he had gone far enough to give effect to his words.

He did not even look at Mercer.
"Watch him closely, old man, and report to me everything that happens.
Find out more about Kedsty, if you can.

I shall advise you how to act.
It is rather ticklish, you know--for you! And"-- he smiled at Mercer--"I'm unusually hungry this morning.