" I could feel Holmes studying me again, and then he asked, “Did something of which I am as yet unaware occur at the Lansdowne House ball?” I might have known Holmes would make that deduction. “I think inhaling cyanide gas might be the part of the evening I remember most fondly.” “Descriptive, certainly,” Holmes murmured, “but ultimately uninformative. "

― Anna Elliott , Death at the Diogenes Club (Sherlock Holmes and Lucy James Mystery #5)