CHAPTER IX. I wanted to go and look at a place right about the middle of the island that I'd found when I was exploring; so we started and soon got to it, because the island was only three miles long and a quarter of a mile wide. This place was a tolerable long, steep hill or ridge about forty foot high. We had a rough time getting to the top, the sides was so steep and the bushes so thick.  We tramped and clumb around all over it, and by and by found a good big cavern in the rock, most up to the top on the side towards Illinois.  The cavern was as big as two or three rooms bunched together, and Jim could stand up straight in it.  It was cool in there. Jim was for putting our traps in there right away, but I said we didn't want to be climbing up and down there all the time. Jim said if we had the canoe hid in a good place, and had all the traps in the cavern, we could rush there if anybody was to come to the island, and they would never find us without dogs.  And, besides, he said them little birds had said it was going to rain, and did I want the things to get wet? So we went back and got the canoe, and paddled up abreast the cavern, and lugged all the traps up there.  Then we hunted up a place close by to hide the canoe in, amongst the thick willows.  We took some fish off of the lines and set them again, and begun to get ready for dinner. The door of the cavern was big enough to roll a hogshead in, and on one side of the door the floor stuck out a little bit, and was flat and a good place to build a fire on.  So we built it there and cooked dinner. We spread the blankets inside for a carpet, and eat our dinner in there. We put all the other things handy at the back of the cavern.  Pretty soon it darkened up, and begun to thunder and lighten; so the birds was right about it.  Directly it begun to rain, and it rained like all fury, too, and I never see the wind blow so.  It was one of these regular summer storms.  It would get so dark that it looked all b