Immediately he set about explaining everything in connection with the handling of the singular craft, and it did not take him long to make it seem an assured thing that the Eagle could be steered in almost any direction, and that, with the aid of horizontal rudders, she could be brought to the ground or sent soaring into the air, without a change of ballast or the body of gas.
Frank was intensely interested.
"It is remarkable, professor!" he cried. "Scotch made a mistake when he refused to accompany you on your trial trip."
"Ha! You are a boy of sense! Saw it the first time my eye rested on you. I will make you famous."
Frank looked surprised.
"How?"
"You shall accompany me on my trial trip."
"How long will it be?"
"As long, or as short as we choose to make it. What do you say? Decide quickly. I am eager to be off."