Eleanor, eager to show how well she could ride, forced her burro past Noddy while the latter was making a slight detour about a sage-brush. She turned partly around to laugh at Polly, when her burro made a sudden lunge away from the trail, and at the same time, a diamond-backed rattlesnake struck out from its coil, reaching at least two-thirds the full length of its body. "Help! Save me!" screamed Eleanor, frantically, but the brave little burro knew how to carry his rider safely out of the way of the reptile. Polly saw the snake coil for another strike at Barbara's horse, which had almost reached the place before Eleanor screamed. The whole occurrence was so unexpected and sudden that Barbara had not seen the swift flash of cinnamon-red and dark diamond-patterned rattler. With great presence of mind, Polly instantly pulled Noddy up on a mound of ground just above the reptile, and caught hold of a long supple branch of wood. In another instant she was whipping the snake until it could not tell from which direction the blows were descending--right, left, front or back! In a moment of indecision, the snake remained quiet and in that second Polly brought down her solid heel upon its flat head. The other girls screamed and turned pale for they thought Polly had fallen from her burro upon the rattler--so quick had been her action. But the moment the daring girl looked up and laughed at them, they also jumped from their saddles and ran up to help. Polly made sure the rattler was quite dead, then took a forked stick and held it up to view. It had beautiful diamond markings of dark-colors on cinnamon-red ground. The belly was of creamy white, and the tail had eight rattles attached to it by means of a peculiar fibrous ribbon. These rattles seemed to be of dry horny skin that made the buzz-sound when shaken. The head had been so crushed open that Polly could easily show the curious girls the poison-fangs which were hinged to the upper jaw. "When a rattler intends to bite, its mouth grasps the object and these fangs drop down into the flesh, puncturing tiny holes into which the fatal poison flows." Polly described the action of the bite minutely, causing her hearers to shiver with dread. Seeing the effect her words had made, she laughed, adding, "A snake does not always bite clear! I mean, the least thing keeps his teeth from driving straight into the flesh, so that the poison bag cannot empty its fluid under the skin. It is often a loose or sidewise bite, so that much of the poison never enters the wound. That is why so many folks survive rattle-snake bites. If it went clean, and the poison bag was emptied under the skin,--pwhew!" Polly whistled to denote her sense of the outcome of such a bite, and Barbara cried, "Oh, mercy, Polly! I feel so sick after hearing you, that I want to go back to Chicago!" Anne laughed at Barbara's fears, saying, "We may not see another rattler all summer!"