Senna-pod brew

Senna-pod brew was part of the household’s nightly routine, drunk by Lady Tressilian’s maid. On the morning Lady Tressilian was found dead, the maid was in a coma because barbiturates had been put into the brew. Its ordinary place in the domestic routine made it a means of disabling the person most likely to respond to an alarm.

The Brew and the Maid

The maid drank a senna-pod preparation every night. Dr. Lazenby established that she had been heavily drugged with a barbiturate and was seriously ill, although he expected her to recover. He also ruled out her having taken a sleeping draught by habit: there was no sign of one in her room. His account connected the drug to the familiar nightly drink rather than to an unexplained change in the maid’s own behavior.

How It Silenced the Household

Lady Tressilian’s bell-pull lay beside her hand. As Dr. Lazenby explained, if she had felt alarm, pulling it would ordinarily have summoned the maid. But the maid, incapacitated by the drugged brew, could not hear the summons. The brew thus mattered not only as the vehicle for the barbiturate but as part of a practical arrangement that left Lady Tressilian without her usual response to danger.

Investigative Significance

Superintendent Battle connected the maid’s coma to the bell-pull and asked whether the maid normally took sleeping draughts. Once Dr. Lazenby confirmed that the barbiturate had been given in the nightly brew, Battle concluded that someone knew the house well enough to exploit its routines. The drink turns a commonplace domestic habit into evidence of foreknowledge: its role is revealed through the failed call for help and the deliberate disabling of the person expected to answer it.