nity. But it was
like looking for a needle in a haystack, almost, to and the sunken ship
in that depth of water.

"Well, we'll try again," said Mr. Swift, as they sank once more beneath
the surface.

It was toward evening, on the second day after this, that Tom, who was
on duty in the conning tower, saw a black shape looming up in front of
the submarine, the searchlight revealing it to him far enough away so
that he could steer to avoid it. He thought at first that it was a
great rock, for they were moving along near the bottom, but the
peculiar shape of it soon convinced him that this could not be. It came
more plainly into view as the submarine approached it more slowly, then
suddenly, out of the depths in the illumination from the searchlight,
the young inventor saw the steel sides of a steamer. His heart gave a
great thump, but he would not call out yet, fearing that it might be
some other vessel than the one containing the treasure.

He steered the Advance so as to circle it. As he swept past the bows he
saw in big letters near the sharp prow the word, Boldero.

"The wreck! The wreck!" he cried, his voice ringing through the craft
from end to end. "We've found the wreck at last!"

"Are you sure?" cried his father, hurrying to his son, Captain Weston
following.

"Positive," answered the lad. The submarine was slowing up now, and Tom
sent her around on the other side. They had a good view of the sunken
ship. It seemed to be intact, no gaping holes in her sides, for only
her plates had started, allowing her to sink gradually.

"At last," murmured Mr. Swift. "Can it be possible we are about to get
the treasure?"

"That's the Boldero, all right," affirmed Captain Weston. "I recognize
her, even if the name wasn't on her bow. Go right down on the bottom,
Tom, and we'll get out the diving suits and make an examination."

The submarine settled to the ocean bed. Tom glanced at the depth gage.
It showed over two miles and a half. Would they be able to venture out
into water of such enormous pressure in the comparatively frail diving
suits, and wrest the gold from the wreck? It was a serious question.

The Advance came to a stop. In front of her loomed the great bulk of
the Boldero, vague and shadowy in the flickering gleam of the
searchlight As the gold-seekers looked at her through the bull's-eyes
of the conning tower, several great forms emerged from beneath the
wreck's bows.

"Deep-water sharks!" exclaimed