“You certainly ought to have a dandy trip.” “I’ll say we will, Frank! We sure wish you could come along.” Frank Hardy grinned ruefully and shook his head. “I’m afraid we’re out of luck. Joe and I may ...

Every second was precious. Frank Hardy realized the full extent of their peril and in the same moment he realized the only way of averting it. Without a word he sprang toward the helm, brushing Biff H...

“I am sure my man is in Chicago. I know for a fact that he went West, and the Windy City would naturally be his hiding place.” Fenton Hardy tapped the library table reflectively with a pencil. Mrs. Ha...

On Monday, Chet Morton and Biff Hooper set out on their motorboat trip up the coast. They were well equipped with provisions and supplies and had been up since six o’clock that morning getting the boa...

Frank Hardy bore down on the helm as the boat heeled over. For a breathless second he thought the craft would be swamped. Water poured over the gunwales. The girls screamed. Joe was thrown off his bal...

No word came from Chet Morton or Biff Hooper the following day. Although the parents of the chums tried to allay their fears by assuming that the lads had not stopped off at Hawk Cove after all or had...

“Good night! We’ll be lucky if we get away on the trip at all!” exclaimed Frank, as he and Joe hastened down the stairs. Mrs. Hardy was already at the front door welcoming Aunt Gertrude, who was expat...

The engine roared as Frank Hardy opened the throttle and bore down on the helm of the Sleuth. The grip of the current about the reef was so strong that, for a moment, it seemed that the motorboat coul...

In spite of Aunt Gertrude’s ingenious explanation of the letter, the Hardy boys were not quite satisfied. When they left the house they walked downtown, discussing the matter. “Aunt Gertrude may be ri...

Perhaps it was because Mrs. Hardy was determined to show that she was mistress in her own home. At any rate, she gave her consent to the proposed expedition. This was in spite of all Aunt Gertrude’s p...

Joe Hardy started violently. Then, realizing that he had been trapped, he dropped flat on the deck, wriggling to one side, wresting himself free of the clutching hand. He heard the man who had seized ...

Frank Hardy bent over the wheel. “I’m going closer,” he said. “We’ll make absolutely sure of this.” He altered the course of the boat so that it would intercept the other craft, at the speed they were...

Profound darkness enveloped the Hardy boys. The blackness of the icy pool was no blacker than the darkness of the air above. Frank rose spluttering to the surface, unharmed by his fall, and as he spla...

The four men had dinner about the campfire and when the meal was over the man they called Red got up. “May as well go back to the cave,” he remarked. “It’s cooler than out here.” “It’s hot enough to p...

The Hardy boys reached the cove in the nick of time. Although the place was protected from the full fury of the sea, the high wind had lashed the waves to such an extent that the boat was pitching and...

The Hardy boys were quivering with excitement. They had found the whereabouts of their chums; they had learned the dismaying news that Fenton Hardy had been captured by his enemies; they had discovere...

The men in the cave lost no time in taking up the pursuit. They had been sleeping in their clothes and, once aroused, hurried out of the cave in search of the fugitives. The boys raced across the rock...

“This is a piece of luck!” declared the redheaded man. He squatted by the fire with his arms folded and surveyed the four prisoners. Frank and Joe had been dragged back to the cave with the others and...

Frank Hardy led the way. He paused in the passage for a few seconds, surveying the scene in the outer cave. All the men were asleep. They were rolled up in their blankets and lay sprawled in the shado...

“What are you going to do, Frank?” shouted Joe Hardy. “They’re going after their boats. We know the cove they’re in, and if we can get there first I’ll tow them out to sea. Then they can’t follow us!”...

In the meantime, what of Chet Morton and Biff Hooper? When they took the wrong turn in the trail it was some time before they realized that the Hardy boys were not running along before them. They were...

Chet Morton leaped back with such violence that he collided with his chum. He had seen the serpent in the nick of time, and his backward leap had been so instinctive and so involuntary that he somehow...

Tony Prito and his chums guided the landing party to the boulders behind which the gangsters and their captives had disappeared, but when Frank Hardy saw that the prey had flown he assumed the role of...