Thus, the balloon can neither ascend
or descend, except within very narrow limits, and its resources, either in gas or ballast, remain comparatively unimpaired.
The Ass, as long as he traveled along the plain, carried his load with ease, but when he began to ascend
the steep path of the mountain, felt his load to be more than he could bear.
So the student sat himself down and waited a while; but the time hung heavy upon him, and he begged earnestly that he might ascend
forthwith, for his thirst for knowledge was great.
Ferguson counted upon following had not been chosen at random; his point of departure had been carefully studied, and it was not without good cause that he had resolved to ascend
at the island of Zanzibar.