“Ahoy!” replied Frank.

“I am ready to come aboard. Throw out your gangway!”

“Is that roof strong enough to bear the weight of the air-ship?” asked Frank.

“Surely, mate! Come down.”

“All right!”

Frank let the air-ship descend and rest upon the roof of the building. Then he sprang down and shook hands with the captain.

Nicodemus was delighted.

He was all equipped for the trip.

But his personal appearance was startling as well as amusing in the extreme.

The old captain had got himself up in the style of the privateer captain of forty or fifty years previous. He wore fancy high boots, clinging cutlass, pistols in belt, a velvet blouse and pea-jacket.