By degrees the vibrations of the ground ceased, and the circle of heat contracted; the most impatient of the spectators approached; one day they gained ten feet, the next twenty, and on the 22nd of August Barbicane, his colleagues, and the engineer could take their place on the cast-iron surface which covered the summit of Stony Hill, certainly a very healthy spot, where it was not yet allowed to have cold feet.
"At last!" cried the president of the Gun Club with an immense sigh of satisfaction.
The works were resumed the same day.

The extraction of the interior mould was immediately proceeded with in order to clear out the bore; pickaxes, spades, and boring-tools were set to work without intermission; the clay and sand had become exceedingly hard under the action of the heat; but by the help of machines they cleared away the mixture still burning at its contact with the iron; the rubbish was rapidly carted away on the railway, and the work was done with such spirit, Barbicane's intervention was so urgent, and his arguments, presented under the form of dollars, carried so much conviction, that on the 3rd of September all trace of the mould had disappeared.
The operation of boring was immediately begun; the boring-machines were set up without delay, and a few weeks later the interior surface of the immense tube was perfectly cylindrical, and the bore had acquired a high polish.
At last, on the 22nd of September, less than a year after the Barbicane communication, the enormous weapon, raised by means of delicate instruments, and quite vertical, was ready for use.

There was nothing but the moon to wait for, but they were sure she would not fail.
J.T.

Maston's joy knew no bounds, and he nearly had a frightful fall whilst looking down the tube of 900 feet.

Without Colonel Blomsberry's right arm, which he had happily preserved, the secretary of the Gun Club, like a modern Erostatus, would have found a grave in the depths of the Columbiad.
The cannon was then finished; there was no longer any possible doubt as to its perfect execution; so on the 6th of October Captain Nicholl cleared off his debt to President Barbicane, who inscribed in his receipt-column a sum of 2,000 dollars.