Dracula by Bram Stoker Chapter 17 Page 20

Count's hiding place! Goodness knows that we had enough clues from the conduct of the patient Renfield! The bundle of letters relating to the purchase of the house were with the transcript. Oh, if we had only had them earlier we might have saved poor Lucy! Stop! That way madness lies! Harker has gone back, and is again collecting material. He says that by dinner time they will be able to show a whole connected narrative. He thinks that in the meantime I should see Renfield, as hitherto he has been a sort of index to the coming and going of the Count. I hardly see this yet, but when I get at the dates I suppose I shall. What a good thing that Mrs. Harker put my cylinders into type! We never could have found the dates otherwise.

I found Renfield sitting placidly in his room with his hands folded, smiling benignly.