"We may have a hard time getting out of the river," returned Matt. "Pedro told Ysabel that the rebels had planted mines in the river bed, close to the fort, and that they were so low in the water we would probably strike them if we tried to pass the fort submerged. Again, if we attempt to gain the gulf by keeping on the surface of the river, the cannon in the fort will bombard us."
"A plague on their mines and their cannon!" cried Dick recklessly. "We'll run past the fort. If the soldiers are all as able as their general, they couldn't hit us with grape and canister."
"Well, that's a bridge for us to cross at a later time," said Matt. "Just at present we have Gaines to think about. He ought to have got back by this time. Clackett, go back to your post in the woods and keep a sharp watch for soldiers. We'll surely have a visit from them now. Up on deck with your hatchet, Dick, and stand ready to cut the cable at the first sign of an attack."
"Aye, aye," responded Dick, picking up the hatchet. "I think, matey, we could capture the whole rebel army if it came our way."
"We've had one experience with the rebel army, Dick," said Matt, "and it was far from pleasant. Let's not repeat the experience. Climb for the deck, and——"
Events were happening for the young motorist and his chums that day! They were coming like the rapid reports of a Gatling gun, and hardly was one issue met and vanquished before another was raised.
Dick and Clackett were on their way up the ladder when a rattle of musketry reached the ears of those in the submarine. It came from the direction of the bank, and was followed by loud cries and a tremendous thrashing among the bushes.
"Hurry!" cried Matt. "Don Carlos must have met a detachment of Pitou's army and have headed them this way! We can't wait any longer for Gaines! Up with you and cut the cable!"
Clackett stepped off the ladder to make room for Matt, who sprang to follow Dick aloft.
When Dick reached the deck, he gave a shout of astonishment.