midnight
He sat down near the cat and her family , and , laying his arm on the shelf above her , rested his head on it . He began to think of another experiment . `` I am so tired , I believe I shall go to sleep again . ` Thought which Knows All ' '' -- he was quoting something the hermit had said to Loristan in their midnight talk -- `` Thought which Knows All ! Show me this little thing . Lead me to it when I awake . '' And he did fall asleep , sound and fast .