Donaldson's career as an aeronaut was brief. His first ascent was made August 30, 1871; his last, July 15, 1875. The story of the first is characteristic of the man. In his lexicon there was no such word as "fail." His balloon was small, holding only eight thousand cubic feet of gas. The gas was of poor quality, and when ready to rise he found it impossible even to make a start until all ballast had been thrown from the basket; and when at length the start was made, it was only to alight in a few minutes on the roof of a neighboring house. Bent upon winning and doing at all hazards what he had undertaken, Donaldson quickly cast overboard all loose objects in the basket--ropes, anchors, provisions, even down to his boots and coat. Thus relieved of weight, he was able to make a voyage of about eighteen miles. There are two essentials to safe ballooning: first, the easy working of the cord which controls the safety valve at the top of the netting, by which descent may be effected when the balloon is going too high; and surplus ballast, which may be thrown out to lighten the balloon when approaching the ground, to avoid striking the earth at dangerously rapid speed. Hence it followed that, his car having been stripped of every bit of weight to obtain the ascent, Donaldson's descent was so violent that he was not a little bruised before he got his balloon safety [Transcriber's note: safely?] anchored again upon the earth. The difficulties and risks of this first trip, arising from the poor appliances he had, were enough to discourage, if not deter, a heart less bold than his, but to him a new difficulty only meant the letting out of another reef in his resolution to conquer it. Thus it was that immediately upon his return from this, his first trip, he not only announced that he would make another ascent the ensuing week, but that he would undertake something never previously undertaken in aerial navigation, namely, that he would dispense with the basket or car swung beneath the concentrating ring of every normal balloon, and in its place would have nothing but a simple trapeze bar suspended beneath the ring, upon which in mid-air, at high altitude, he proposed to perform all feats done by then most highly trained gymnasts in trapeze performances. His experience on this first trip, to quote his own phraseology, was "so glorious that I decided to abandon the tight-rope forever." The second ascent was made in a light breeze. When approximately a mile in height, to quote a chronicler: