"I don't care what it is," replied Bart. "It's shelter of some kind, and that's enough for me." "Wonder if there's any one living here," remarked Billy Waldon, his eyes sweeping the great mass for some sign of life. "Even the bark of a dog would be welcome to-night." "Not a light anywhere," commented Tom. "If there's anybody living here I guess they're dead." "There's not even a door to knock at," said Frank Sheldon, looking into the yawning space of what had evidently been an entrance to the tower. "I guess we'll have to go on a little exploring expedition. Come along, fellows, and get out of the wind. Lucky that I have my flashlight along." They crowded in on their leader's heels, first, as a precaution, seeing that their weapons were ready, though there did not seem to be the faintest chance of their being required. Frank drew his flashlight, and the streaming rays illuminated a long passageway whose end they could not see. There were open spaces in the roof and walls through which the snow had drifted in spots, but there were other parts that were clear and dry, and these were welcomed by the boys with immense relief after their long battle with the snow. At a turning of the corridor they came upon a large room that, although mildewed and dilapidated and wholly bereft of furniture, was intact as far as the walls and ceiling were concerned. But what especially caught their eyes was a huge stone fireplace, and at once they decided to end their explorations for the present right there. "Perhaps that hot coffee wasn't such a dream after all," chuckled Billy. "We've got plenty of the stuff in our kits, and all we need is some hot water." "There's no end of broken branches about here," said Frank. "Let's get a pile of them in here, and we'll have a fire started in less than no time." Though Tom said that the wood would probably be too wet to burn, he turned in heartily with the others, and in a few minutes they had a bigger pile of wood ready than probably the old room had ever seen before. Then by careful nursing of some chips and twigs a blaze was started that soon developed into a roaring fire, before which the boys stood and dried out their wet clothes and toasted themselves until they were in a glow. The coffee problem was now a simple one, as all they had to do was to melt snow enough to furnish the hot water, and they used the cooking utensils that they had in their kits, for they had started out that afternoon in full marching order. Savory odors soon announced that the fragrant brew was ready, and they almost scalded their throats in the eagerness to partake of it. "Yum-yum!" murmured Tom after his second cup. "Nectar has nothing on this." "I'll say so," agreed Billy, with a blissful expression on his face. "We never knew how good it was until we thought we couldn't get it," grinned Bart.