course. If we don't know what
we are doing, we might get into lots of trouble!"

"Maybe you're right, Ned!" assented Frank. "What shall we do?"

"I think we'd better cruise carefully along on the surface until we see a
ship. We can ask them for our latitude and longitude. From that we'll be
able to lay a course to any point."

"Maybe they'll give us a chart, too!" put in Harry.

"All right, then, here goes!" shouted Jimmie preparing to slide down the
ladder. "Somebody'll have to keep on deck."

Harry at once followed Jimmie into the interior. The engines responded to
his touch. The new "U-13" sprang forward half submerged.

"We've got plenty of gas in the tanks, Harry," stated Jimmie to his chum
as the latter moved about the interior looking after the machinery.
"We're making only about fifteen miles now by this log."

"I'll give them another touch," responded Harry. "The sooner we get
there, the quicker we'll arrive, so here goes!"

The increased speed of the engines urged the submarine ahead at a goodly
rate. Jimmie presently declared that the log indicator showed a good
twenty-five miles an hour. Those on the little deck above the conning
tower found the increased speed uncomfortable by reason of the dashing
spray, but all felt that this was not unendurable.

"Sail, ho!" Ned presently called down the hatchway.

"Where away?" asked Harry, looking up at his comrade.

"Almost dead ahead!" replied Ned. "We're overhauling them fast. It looks
to be a three masted ship as nearly as I can make out!"

"Hold your course, Jimmie!" directed Jack. "We'll come up close enough to
hail them in a little while just as we are heading!"

In a few minutes the ship was so close that all could make out the
details of her rigging. It was a large three masted square-rigged vessel
evidently in ballast for the hull was high out of water.

"I believe they see us!" announced Frank, using a pair of binoculars he
had found among the fittings of the submarine.

"Can you make out the flag at the peak?" asked Jack.

"Yes, I think so. I believe it is the British flag."

"Then, they'll be glad to help us out, especially if they find that we
intend to turn the 'U-13' over to their government!"

"I don't know about that!" doubted Frank. "I see men running aloft. It
looks as if they're rigging out studding sail booms on the main yards.
And I see others on the topsail yards," declared the boy.

"Why, in that case, they're trying to ge