So during the supper one of them got to comparing the chests of the two men, and exciting their rivalry as to which had the larger lungs. When he had them fully primed he said he had means of testing the matter, and brought out the twin air mattresses. Eagerly then the guides lay flat on their stomachs, and at the word started to blow like two-horse power engines. The first test was declared a _tie_; and after that the guides could hardly wait for night to come to try out their lungs against each other.