How uncommonly stupid it was of you to do so! "said Bywater, pretending to take the remark literally. "I would not keep a duplicate pair of keys by me--I should make sure they'd bring me to grief. What do you say? You did not keep duplicate keys--they were false ones! Why, that's just what we all told you last night. The bishop told you so. He said he knew you had made a mistake, and taken out the wrong keys for the right. My belief is, that you went out without any keys at all. You left them hanging upon the nail, and you found them there. You had not got a second pair!