He probably introduced himself and mentioned that he had met a Marston Greyle in America.

Then the Squire saw the probabilities of detection--and what subsequently took place was most likely what you suggest.

It may have been that the Squire recognized Bassett Oliver, and knew that he'd met Marston Greyle; it may have been that he didn't know him and didn't know anything until Bassett Oliver enlightened him.

But--either way--I firmly believe that Bassett Oliver came to his death by violence--that he was murdered.

So--there's the case in a nutshell! Murdered!--to keep his tongue still." "What's to be done, then ?" asked Sir Cresswell as Petherton tapped the cablegram.
"The first thing," he answered, "is to make use of this.