It was plain that the cat knew the rules of her game perfectly well, and enjoyed it keenly.  It was equally plain that the fly could not make head or tail of what it was all about.  If it had been able to do so it would have gone to play in the upper part of the window, where the cat could not reach it.  Perhaps it was always hoping to get through the glass, and escape that way; anyhow, it kept pretty much to the same pane, no matter how often it was rolled.  At last, however, the fly, for some reason or another, did not reappear on the pane, and the cat began looking everywhere to find it.  Her annoyance when she failed to do so was extreme.  It was not only that she had lost her fly, but that she could not conceive how she should have ever come to do so.  Presently she noted a small knot in the woodwork of the sill, and it flashed upon her that she had accidentally killed the fly, and that this was its dead body.  She tried to move it gently with her paw, but it was no use, and for the time she satisfied herself that the knot and the fly had nothing to do with one another.  Every now and then, however, she returned to it as though it were the only thing she could think of, and she would try it again.  She seemed to say she was certain there had been no knot there before—­she must have seen it if there had been; and yet, the fly could hardly have got jammed so firmly into the wood.  She was puzzled and irritated beyond measure, and kept looking in the same place again and again, just as we do when we have mislaid something.  She was rapidly losing temper and dignity when suddenly we saw the fly reappear from under the cat’s stomach and make for the window-pane, at the very moment when the cat herself was exclaiming for the fiftieth time that she wondered where that stupid fly ever could have got to.  No man who has been hunting twenty minutes for his spectacles could be more delighted when he suddenly finds them on his own forehead.  “So that’s where you were,” we seemed to hear her say, as she proceeded to catch it, and again began rolling it very softly without hurting it, under her paw.

My friend and I both noticed that the cat, in spite of her perplexity, never so much as hinted that we were the culprits.  The question whether anything outside the window could do her good or harm had long since been settled by her in the negative, and she was not going to reopen it; she simply cut us dead, and though her annoyance was so great that she was manifestly ready to lay the blame on anybody or anything with or without reason, and though she must have perfectly well known that we were watching the whole affair with amusement, she never either asked us if we had happened to see such a thing as a fly go down our way lately, or accused us of having taken it from her—­both of which ideas she would, I am confident, have been very well able to convey to us if she had been so minded.