“If this man was murdered, how was it done?” asked the former.

“Poison,” said Sherlock Holmes curtly, and strode off. “One other thing, Lestrade,” he added, turning round at the door: “ Rache , is the German for ‘revenge’; so don’t lose your time looking for Miss Rachel.”

With which Parthian shot he walked away, leaving the two rivals open-mouthed behind him.