4. Who does Hercule Poirot ask to help him investigate Joyce's murder?
From Quiz Halloween Party
Answer:
Superintendent Spence
Mrs. Oliver, very upset by Joyce's murder, hurries to London, and asks Hercule Poirot's help in finding the killer. Superintendent Spence had retired from the police force, and now lived in Woodleigh Common with his widowed sister, Elspeth. He agrees to help Poirot all he can. This is not the first case that involved Spence, Poirot, and Mrs. Oiver. They worked together to solve Mrs. McGinty's murder in "Mrs. McGinty's Dead" (1952), also known as "Blood Will Tell". Hastings was not in "Halloween Party". Roger Ackroyd was the victim in "The Murder of Roger Ackroyd" (1926). Justice Wargrave was on Indian Island in "Ten Little Niggers" (1939), also known as "And Then There Were None" and "Ten Little Indians". This book did not feature Poirot, but is a fine mystery, anyway.