midnight
At the end of the second day the encampment was made for the night by the side of a little stream which flowed from the mountains to the left of their course . During the previous nights Angel was quiet , but as darkness set in his uneasiness gave George sufficient information to indicate some trouble , and the boys attributed it to the presence of the wild animals , which they knew abounded on the south side of the stream . Two were delegated to watch during the night , and at recurring intervals Angel manifested alarm . From midnight until the break of day he was constantly awake , and showed his alarm , but when it was daylight a hurried survey of the immediate locality betrayed no signs of an enemy . Within a mile of their camp they came across a camp fire , around which was strewn the bones which were left from the feast . The Professor and John were up in an instant and carefully examined the litter surrounding the fire , as well as the indications of footprints . The latter were unmistakable at many places , and both announced that the savages had been there , beyond question .