"Your father was a very clever man, Susan.

Too clever for some people.

He made this secret entrance when the new wing of the cottage was built five years ago, and those who employed him gave him arsenic by way of a reward.
Tyke died of arsenic also, so they are carrying on the same game." "Oh dear, oh dear!" wept Susan, not hearing the latter part of the sentence.

"So father was poisoned after all.

Who did it, sir ?" "I can't tell you that," said Jennings, becoming cautious.