"Anyway, I know how to make a map, now, and that is just exactly what I needed to know in order to set my trap for the prowler who is continually searching this cabin. It's all ready but the map, and I may as well finish up the job to-day as any time." From the pocket of her shirt she drew a photograph and examined it critically. "It looks a good deal like the close-up of one of daddy's," she said approvingly, "and it certainly looks as if it might have been carried for a year." Returning the picture to her pocket, she folded the preacher's map with her father's and replaced them in the envelope, then making her way to the coulee, extracted from the tin can two or three of her father's ore samples. These, together with a light miner's pick, she placed in an empty flour sack which she secured to her saddle and struck out northwestward into the hills. At the top of the first divide she stopped, carefully studied the back trail, and producing paper and pencil made a rough sketch which she marked 1 NW. She rode on, mapping her trail and adding letters and figures to denote distance and direction. Her continued scrutiny of the back trail satisfied her that she was not followed. Two hours brought her to her journey's end, a rock wall some seven miles from her cabin. Producing the photograph, she verified the exact location, and with her pick, proceeded to stir up the ground and loose rocks at the base of the ledge. For an hour she worked steadily, then carefully replaced the dirt and small fragments, taking care to leave the samples from her sack where they would appear to have been tossed with the other fragments. Indicating the spot by a dot on the photograph she rode back to her cabin and spent the entire afternoon covering sheets of paper with trail maps, and letters, and figures, in an endeavor to produce a sketch that would pass as a prospector's hastily prepared field map. At last she produced several that compared favorably with her father's and taking a blank leaf from an old notebook she found in the pack sack, drew a very creditable rough sketch.