Citizens of the United States--Good-by!" And the "Albatross," beating the air with her seventy-four screws, and driven by her propellers, shot off towards the east amid a tempest of cheers.
The two colleagues, profoundly humiliated, and through them the whole Weldon Institute, did the only thing they could.

They went home.
And the crowd by a sudden change of front greeted them with particularly keen sarcasms, and, at their expense, are sarcastic still.
And now, who is this Robur?
Shall we ever know?
We know today.

Robur is the science of the future.

Perhaps the science of tomorrow.

Certainly the science that will come! Does the "Albatross" still cruise in the atmosphere in the realm that none can take from her?
There is no reason to doubt it.
Will Robur, the Conqueror, appear one day as he said?
Yes! He will come to declare the secret of his invention, which will greatly change the social and political conditions of the world.
As for the future of aerial locomotion, it belongs to the aeronef and not the aerostat.
It is to the "Albatross" that the conquest of the air will assuredly fall.
-- End of Voyage Extraordinaire--Robur the Conqueror--.