In April, 1843—but on what exact date I do not know, an experimental voyage was made from the Hill of Dumbuck, near Glasgow, by Professor Geolls. He successfully negotiated the descent of the inclined plane, and rapidly rose in the air, until he reached an altitude of nearly 3 miles. Feeling giddy, he determined to descend to a mile and a half above the earth. “This I easily effected by depressing the tail of the machine, which, up to this moment, I had kept at an angle with the horizon of 9¾ degrees, to that of 45. My course I had not varied since leaving the hill; it was, per compass, south-west, and by west, half-west, passing over Ayrshire, and in a direct line from Dumbuck to Ailsa Craig, whither, indeed, I was tending, with the view of landing, the latter being admirably suited for launching the machine in a similar way to that adopted at Dumbuck, on my return home again. “Daylight had now broken, and the scene was most gorgeous. I passed many ships; and, in particular, one steamer, but whose paltry speed, in comparison with mine, was nothing. Alas! however, this was not destined to last; for, just as I had shot ahead of the steamer, something went wrong with the machinery, and the fanners stopped. This did not at all alarm me; for, as described by Mr. Henson, these fanners are only necessary for propulsion, and not at all requisite for maintaining the machine in the air. Unfortunately, however, I perfectly forgot, in the hurry of the moment, to remove the weights from the safety valve, and the effects from this were disastrous in the extreme. The great accumulation of steam that took place was too much for the pipes; and, consequently, bang went three of them, at the same instant. The machine, at this exact moment, feeling its equilibrium altered, surged considerably, and the remaining pipes necessarily followed the example of the others: fizz—bizz—whizz, away they went, one after the other, like pop guns. Unfortunately, one of these pipes, in flying off, struck a bamboo stretcher, and shattered it so, that the machine, losing bearance on one side, toppled over and became perfectly unmanageable; she, in fact, whirled over and over in a way that may be imagined, but which it is altogether impossible to describe. “I, of course, was now descending with fearful rapidity, and nothing was left me to contemplate but death and destruction. I can only compare my sensations at this moment to those experienced in a nightmare, which, everyone knows, are not the most agreeable in the world. Sensibility now forsook me; and, indeed, this was not to be wondered at, in consequence of the whirling of the machine. On coming to my senses again, I found myself in bed, with severe headache, nausea and vomiting, the usual accompaniments of such a flight through the air; but, thanks to Providence, I am now in a fair way of recovery, and willing to perform the same feat again.”