Hearts of Three by Jack London — Read

So it came about that the Valley of the Lost Souls was invaded subterraneously from opposite directions by two parties of treasure-seekers. From one side, and quickly, came the Queen and Leoncia, Henry Morgan, and the Solanos. Far more slowly, although they had started long in advance, did Torres and the Jefe progress. The first attack on the mountain had proved the chiefest obstacle. To blow open an entrance to the Maya caves had required more dynamite than they had originally brought, while the rock had proved stubborner than they expected. Further, when they had finally made a way, it had proved to be above the cave floor, so that more blasting had been required to drain off the water. And, having blasted their way in to the water-logged mummies of the conquistadores and to the Room of the Idols, they had to blast their way out again and on into the heart of the mountain. But first, ere they continued on, Torres looted the ruby eyes of Chia and the emerald eyes of Hzatzl.

Meanwhile, with scarcely any delays, the Queen and her party penetrated to the Valley through the mountain on the opposite side. Nor did they entirely duplicate the course of their earlier traverse. The Queen, through long gazing into her Mirror, knew every inch of the way. Where the underground river plunged through the passage and out into the bosom of the Gualaca River it was impossible to take in their boats. But, by assiduous search under her directions, they found the tiny mouth of a cave on the steep wall of the cliff, so shielded by a growth of mountain berries that only by knowing for what they sought could they have found it. By main strength, applied to the coils of rope which they had brought along, they hoisted their canoes up the cliff, portaged them on their shoulders through the winding passage, and launched them on the subterranean river itself where it ran so broadly and placidly between wide banks that they paddled easily against its slack current. At other times, where the river proved too swift, they lined the canoes up by towing from the bank; and wherever the river made a plunge through the solid tie-ribs of mountain, the Queen showed them the obviously hewn and patently ancient passages through which to portage their light crafts around.