Edward Phillips Oppenheim, The Great Impersonation — Chapter XVIII (1920)
“ Lady Dominey, except for one hallucination, is in perfect health, mentally and physically.""And this one hallucination?""That you are not her husband."Dominey was silent for a moment. Then he laughed a little unnaturally."Can a person be perfectly sane," he asked, "and yet be subject to an hallucination which must make the whole of her surroundings seem unreal?""Lady Dominey is perfectly sane," the doctor answered bluntly, "and as for that hallucination, it is up to you to dispel it." ”
