The moon was high and full, the footing almost noiseless, and everything so quiet that I quickly located the clucking sounds as coming from the orchard. I came out of the birches into the wood-road, and was crossing the open field to the orchard, when something dropped with a swish and a vicious clacking close upon my head. I jumped from under my hat, almost,--and saw the screech owl swoop softly up into the nearest apple tree. Instantly she turned toward me and uttered the gentle purring cluck that I had been guessing at so hard for at least three years. And even while I looked at her, I saw in the tree beyond, silhouetted against the moonlit sky, two round bunches,--young owls evidently,--which were the explanation of the calls. These two, and another young one, were found in the orchard the following day. I rejoined the guessers on the porch and gave them the satisfying fact, but only after two or three years of guessing about it. I had laughed once at some of my friends over on the other road who had bolted their front door and had gone out of the door at the side of the house for precisely twenty-one years because the key in the front-door lock wouldn’t work. They were intending to have it fixed, but the children being little kept them busy; then the children grew up, and of course kept them busier; got married at last and left home--all but one daughter. Still the locksmith was not called to fix that front door. One day this unmarried daughter, in a fit of impatience, got at that door herself, and found that the key had been inserted just twenty-one years before--_upside down_! There I had sat on the porch--on a stump, let us say, and guessed about it. Truly, my key to this mystery had been left long in the lock, upside down, while I had been going in and out by the side door. No, you must _go_ into the fields and woods, go deep and far and frequently, with eyes and ears and all your souls alert! NOTES AND SUGGESTIONS CHAPTER I TO THE TEACHER