against his son.
It seemed incredible, yet the officers were not ones to perpetrate a
joke. The chief and constable had driven from town in a carriage, and
they now invited the inventor to ride back with them.

"Do you mean to tell me a warrant has actually been sworn out against
my son, Chief?" asked the father, when they were near the town hall.

"That's just what I mean to say, Mr. Swift, and, I'm sorry, on your
account, that I have to serve it."

"Hub! Don't look like you was goin' to serve it," remarked the
constable. "He's skipped out."

"That's all right, Higby," went on the chief. "I'll catch em both.
Even if they have escaped in an airship with their booty, I'll nab 'em.
I'll have a general alarm out all over the country in less than an
hour. They can't stay up in the air forever."

"A warrant for Tom--my son," murmured Mr. Swift, as if he could not
believe it.

"Yes, and for that Damon man, too," added the chief. "I want him as
well as Tom, and I'll get 'em."

"Would you mind letting me see the warrants?" asked the inventor, and
the official passed them over. The documents were made out in regular
form, and the complaints had been sworn to by Isaac Pendergast, the
bank president.

"I can't understand it," went on Tom's father. "Seventy-five thousand
dollars. It's incredible! Why!" he suddenly exclaimed, "it can't be
true. Just before he left, Mr. Damon--"

"Yes, what did he do?" asked the chief eagerly, thinking he might
secure some valuable evidence.

"I guess I'll say nothing until I have seen the bank president,"
replied Mr. Swift, and the official was obviously disappointed.

The inventor found Mr. Pendergast, and some other bank officials in the
town hall. The financiers were rather angry when they learned that the
accused persons had not been caught, but the chief said he would soon
have them in custody.

"In the meanwhile will you kindly explain, what this means?" asked Mr.
Swift of the president.

"You may come and look at the looted vault, if you like, Mr. Swift,"
replied Mr. Pendergast. "It was a very thorough job, and will seriously
cripple the bank."

There was no doubt that the vault had been forced open, for the locks
and bars were bent and twisted as if by heavy tools. Mr. Swift made a
careful examination, and was shown the money drawers that had been
smashed.

"This was the work of experts," he declared.

"Exactly what we think," said the president. "Of course we don't
be