"I have at hand your kind invitation. However, I am far from being in good physical health. I am satisfied that if I were offered a $50 bill after my lecture, I would not have strength enough to refuse it."
[Though Holmes's hearing declined with age, his fondness for flattery did not. "I am a trifle deaf, you know," he would say when complimented. "Do you mind repeating that a little louder?"]