At the end of this London-set story, demonstrators are seen carrying a placard reading "Suicide Is No Defense". As the characters are British, and the setting is England, the last word ought to be spelled in the British manner ("defence") rather than the American.
When Grimsmith points out Lord Kemble to Paynter from an upstairs window, he describes him as "the old man in the comforter". As the character is British and the setting London, he wouldn't say "comforter", he'd just say "scarf".