Sir Lionel (The A.B.C. Murders)

In the novel The A.B.C. Murders, Sir Lionel is an Assistant Commissioner of the Scotland Yard (his last name is not stated). After the letter "B" murder, he chaired a meeting at Scotland Yard with Dr Thompson, Inspector Crome, Poirot and Hastings to discuss whether and so much information should be given to the press. On the one hand, it was generally felt that publicising the facts would only end up giving the killer what he craved. On the other hand, to refrain from publicising it would be to balk him and then he would only kill again and again until he got the attention he wanted. The meeting ultimately defered to Crome's suggestion to wait until the a letter for "C" arrived before publicising anything.