It was sunset along the Calcutta waterfront. The reflection of the vivid tropical sky turned the murky water of the Hooghly River into a rippling rainbow. The river was alive with a variety of craft, including native sailboats, side-wheel steamers that plied up and down the Hooghly between Calcutta and the Bay of Bengal, eighty miles south, as well as sturdy tugs, launches, and lighters that served the ocean-going ships moored in midstream along the strand.
Biff Brewster was standing at the bow of a big freighter, the 10,000-ton Northern Star, which only that afternoon had cast anchor in the Port of Calcutta. Biff was a blond-haired youth of sixteen, with broad, square shoulders and blue-gray eyes that were as keen and expressive as his strong, well-formed features. With Biff were two other boys, his companions in previous adventures.
One was Kamuka, a Brazilian boy of Biff’s own size and age. They had met at the headwaters of the Amazon, where Biff had accompanied his father, Thomas Brewster, in an adventurous search for a fabulous gold mine. Kamuka, who had spent most of his life on jungle rivers, was keenly interested in the scenes he now was viewing along the Hooghly.
The other boy was slightly younger and smaller of build, but quite as wiry and athletic as his two companions. He was Likake Mahenili, a Hawaiian youth known as “Li” to his friends. Li, a skilled diver, had helped Biff crack the riddle of a vanished sloop when they had teamed in a thrilling sea hunt off the Hawaiian shores.
Now, all three were newly arrived in India, the land of mystery. But there was no mystery as to why and how they happened to be together. That was due to a simple turn of events.
Months ago, Biff’s father had gone to India to open long-neglected gold mines in some of the former princely states that had been absorbed by the Indian Republic. It had taken much longer than Mr. Brewster expected – as many of his jobs did – so he had arranged for the family to come by air to India and join him there.
Meanwhile, Biff had invited Kamuka to come from Brazil and spend his vacation in the United States. By a quick switch of plans, Biff and Kamuka had flown to San Francisco just in time to take last-minute passage on the Northern Star, which cost less for both than Biff’s trip would have by air.
The freighter had been scheduled to call at Honolulu, so Biff had written ahead to Li, who had not only met the ship there, but had decided to come along on his own. They had broken the monotony of the long voyage with brief stops at ports on the way, but so far, it had been more of a sightseeing tour than an adventure. They still had one more night to spend on shipboard as the Northern Star had reached Calcutta a day ahead of schedule.
“Tomorrow,” Biff declared, “Dad will be here to meet us. By now, my mother and the twins should have reached Darjeeling, so he may be bringing them along to visit the gold fields.”
“I hope that Mr. Brewster shows us the Kolar Mines at Mysore,” declared Li enthusiastically. “They have shafts that go down two miles, the deepest in the world.”
“Except for those in South America,” put in Kamuka stoutly. “They are the world’s deepest. I learned that at technical school in Brasilia.”
“And I suppose they taught you that South America has the biggest mountains, too,” returned Li. “Just wait until we see Mt. Everest. Those Himalayas will make your Andes look like a lot of ant hills.”
“I shall wait until I see them before I judge,” said Kamuka complacently. “But since you speak of ant hills, the ones we have in Brazil are bigger than anywhere else.”
“You can’t win, Li,” laughed Biff. “Kamuka has an answer for everything.”
“You’re telling me?” returned Li, with a grin. “He even answers questions before I ask them.”
This good-natured banter had been going on all across the Pacific. In the friendly disputes between Kamuka and Li, Biff had been called upon to act as judge. So now he gestured toward the river, with the comment:
“Let’s keep our minds on what we’re watching for – the tidal bore coming up the river. I’d say it’s due any moment now, the way those boats are getting ready for it.”
Tugs and side-wheelers were bracing to buck the incoming tide, while the native boats were hoisting colorful sails and poising in midstream, ready to take off up the river. Biff had his movie camera with him and he began taking color pictures of the scene, including activity along the shore, where tiny craft were hastily shoving off.
“They’ll have to clear those piers,” Biff commented, “or they may be smashed like eggshells when the bore hits.”
The other boys nodded as they scanned the deepening purple of the river. But even their keen eyes failed to detect a motion on the darkened steps of an old pier. There, a slim, furtive figure was crouched close to the water, looking out toward mid-channel.
Carefully, the huddled watcher fingered a watertight packet attached to a thin chain around his neck; then, satisfied that it was safe, he slid his sleek, brown form into the river and began swimming smoothly, swiftly toward the
