About eight o’clock
The present contention is that Mrs. Inglethorp died of strychnine poisoning , presumably administered in her coffee . '' `` Yes ? '' `` Well , what time was the coffee served ? '' `` About eight o'clock . '' `` Therefore she drank it between then and half-past eight -- certainly not much later . Well , strychnine is a fairly rapid poison . Its effects would be felt very soon , probably in about an hour .