Mr. Damon is there, too."

"Blessing every thing he lays eyes on, I suppose," remarked Mrs.
Nestor, with a smile.

"Yes, and some things he doesn't see," agreed Tom. "He is going with us
on this submarine trip."

"Oh, Tom, are you going to undertake another of those dangerous
voyages?" asked Mary, in some alarm.

"Well, I don't know that they are particularly dangerous," replied Tom,
with a smile. "But we expect to make a search for a sunken treasure
ship in a submarine. That's the vessel I'm working on now," he added.
"We're rebuilding the Advance, you know, making her more up-to-date,
and adding some new features, including her name--M. N. 1."

"I suppose Mr. Damon's friend is getting anxious to make a start,
particularly as he has already invested several thousand dollars in the
project," went on the young inventor. "He formed a company to pay half
the expenses of the search, and they will share in the treasure--if we
find it," Tom said. "I wish Mr. Damon, who holds most of the shares the
promoter let out of his own hands, had not gone into it, but, since he
has, I'm going to do the best I can for him."

"Then aren't you friendly with the other man?" asked Mary.

"I don't especially care for him," the young inventor admitted. "He
isn't just my style--too fond of himself, and all that. Still I may be
misjudging him. However, I'm in the game now, and I'm going to stick.
I'll have to be traveling on," he said. "Mr. Damon and his friend are
at my house, and they've been telephoning all over to find me. I guess
this was one of the first places they tried," he said with a smile,
referring to the fact that he spent considerable time at Mary's home.

"Well, I'm glad they found you, but I'm sorry you have to go," Mary
said with a smile.

A little later Tom Swift, with Ned, for whom he called, was on his way
back home in his Air Scout, having said goodbye to Mary and her mother
and expressing the hope that Mr. Keith would soon be over his business
troubles.

"Oil wells are queer, anyhow," mused Tom.

Then Tom got to thinking about Dixwell Hardley: "I don't like the man,
and the more I see of him the less I like him. But I'm in for it now,
and I'll stick to the finish. I only wish I could locate the treasure
ship, give him his share, and get back to my work. I'm going to try to
turn out an airship that a man can use as handily as he does a flivver
now."

Musing on the possibilities in this field, Tom, having lef