were half way over the structure and two of the men who were
wounded in the legs were limping painfully.

Rushing up behind them noiselessly, Harry and his partner each grasped a
man by the neck.

CHAPTER XV.

PUMPING A PRISONER.

"Gentlemen, you are our prisoners!" cried Harry.

The bursting of a bomb could not have startled the smugglers more.

With cries of affright, they glanced around and seeing who was attacking
them, they were more startled than ever.

The detectives had grasped the wounded men.

Seeing their peril, the two uninjured Canadians rushed to the rescue.

With one accord, the detectives hurled their prisoners to the planks of the
bridge and sprang forward eagerly to meet their foes.

The next moment the smugglers drew their pistols.

Before they could fire a shot, the detectives let their fists fly, and in a
moment more a terrific fight was going on.

During the fracas Clara escaped.

Bang! went Old King Brady's powerful fist against the jaw of one of the
villains, and it knocked the man flat on his back.

He was stunned.

As he fell close to the wounded man whom Harry had flung down, the old
officer whipped out his handcuffs and linked the pair together.

Harry had kicked the pistol out of his opponent's hand.

The man now had to depend upon his fists.

Both he and Young King Brady met with a crash and were punching each other
furiously when the old detective arose.

It was Jean, the one who had smuggled the diamonds over the border, and
Harry was delighted over the discovery.

The young detective was a scientific boxer.

He warded off several heavy swings and gave Jean an upper cut on the mouth
that split his lips open.

The man recoiled, but Harry followed him up like a bull dog.

He received a painful blow in the stomach, and caught Jean's foot as he
aimed a swinging kick at the boy.

Harry clung to the man's ankle.

Giving it a jerk, he upset the Canadian's balance and Jean fell with a
crash, and rolled over.

He was just going to rise when the boy pounced on him, and a fierce
struggle began for the mastery.

Old King Brady would have gone to his pupil's aid had not the other wounded
man drawn a pistol and opened fire on him.

A bullet whistled past the old detective's head.

He sprang at the man just as he was about to fire a second shot and
grasping him by the wrist, turned the pistol aside.

The ball was spent harmlessly in the air.

Jabbering in