“We’ll be eaten alive out there in the jungle,” protested Jimmie.

“Besides, it would be more natural for us to go to Gatun for our supplies,” Peter Fenton said.

“There are reasons why he wants us to remain in the jungle near Gatun for a time,” Ned replied, and the boys separated, Jimmie strolling off in the wake of “His Nobbs,” “just to see if he couldn’t make him cough up something,” as he expressed it.

The mystery of the theft of the emerald necklace was still unsolved, the man whose picture Ned carried in his brain had not been found, Pedro had been among the missing ever since he had walked out of the Shaw residence on the morning after the robbery. When the boys landed at Colon the next morning the case upon which they were engaged was still new ground before them.

Frank Shaw continued to take the loss of his emeralds very seriously, and at no time during the trip to Colon had he failed to keep an eye out for Pedro, whom he suspected of having admitted the thief to the house.

“His name isn’t Pedro at all,” he said, as the train sped out of the network of tracks behind Colon, “but Pedrarias. That was the name of the robber who succeeded Balboa as governor of New Granada, the pirate who stood Balboa up against a wall and shot him. Pedro, as I call him for short, declares that he is a direct descendant of that old stiff. He says the Spanish blood in his veins is pure. Great Scott! if I had such a pirate for an ancestor, I’d keep mighty still about it.”

Peter Fenton was in his element now. As the train moved away from Colon he pointed out various points of interest, and supplied such information about them as he had gleaned from the maps and books he had consulted. The ruins of the old French workings were soon in sight, the locality where millions had been squandered in graft. And there was Mount Hope Cemetery, where thousands who had perished from fever had been buried.

“The doctors have cleaned out the fever now,” he said, “by cleaning out the mosquitoes—the poison kind with the long name,” he added. “The Canal Zone is about as healthy now as the city of New York.”

Then came thickets where the trees were tied together with vines and creepers, all in gorgeous bloom. The great trees lifting their heads out of the jungle reminded the boys of the electric towers of New York, the twists of vines resembling the mighty cables which convey light, heat and power to the inhabitants of Manhattan.

As if in rivalry of the wealth of blossoms, bright-plumaged birds darted about like butterflies of unnatural growth. Now and then they saw evil looking lizards, some of them a yard in length, scuttling off through the marshes or looking down from high limbs. There was a swampy atmosphere over all the landscape.