"Explain yourself," said the puzzled doctor.
"We-ll," drawled Muir, "two or three years ago I camped by the Muir Glacier for a week. I had caught just such a cold as this from the same cause—a stuffy stateroom. So I made me a little sled out of spruce boughs, put a blanket and some sea biscuit on it and set out up the glacier. I got into a labyrinth of crevasses and a driving snowstorm, and had to spend the night on the ice ten miles from land. I sat on the sled all night or thrashed about it, and had a dickens of a time; I shivered so hard I shook the sled to pieces. When morning came my cold was all gone. That is my prescription, Doctor. You are welcome to use it in your practice."
"Well," laughed the doctor, "if I had such patients as you in such
