The Haunted Hotel: A Mystery of Modern Venice - Wilkie Collins - Platanus Publishing

“He put his medical questions. They were promptly and plainly answered; and they led to no other conclusion than that the strange lady was, mentally and physically, in excellent health. Not satisfied with questions, he carefully examined the great organs of life. Neither his hand nor his stethoscope could discover anything that was amiss. With the admirable patience and devotion to his art which had distinguished him from the time when he was a student, he still subjected her to one test after another. The result was always the same. Not only was there no tendency to brain disease--there was not even a perceptible derangement of the nervous system. ‘I can find nothing the matter with you,’ he said. ‘I can’t even account for the extraordinary pallor of your complexion. You completely puzzle me.”