He felt the beating of Lady Helena's heart, as she clung to his arm.

He had no thought of turning back. Neither had John. The young captain, followed closely by the whole party, and protected by the intense darkness, crept along the ridge, stopping when some loose stone rolled to the bottom. If the savages were still in the ambush below, these unusual sounds might provoke from both sides a dangerous fusillade.

But speed was impossible in their serpent-like progress down this sloping crest. When John Mangles had reached the lowest point, he was scarcely twenty-five feet from the plateau, where the natives were encamped the night before, and then the ridge rose again pretty steeply toward a wood for about a quarter of a mile.

All this lower part was crossed without molestation, and they commenced the ascent in silence. The clump of bush was invisible, though they knew it was there, and but for the possibility of an ambush, Glenarvan counted on being safe when the party arrived at that point. But he observed that after this point, they were no longer protected by the taboo. The ascending ridge belonged not to Maunganamu, but to the mountain system of the eastern side of Lake Taupo, so that they had not only pistol shots, but hand-to-hand fighting to fear. For ten minutes, the little band ascended by insensible degrees toward the higher table-land. John could not discern the dark wood, but he knew it ought to be within two hundred feet. Suddenly he stopped; almost retreated. He fancied he heard something in the darkness; his stoppage interrupted the march of those behind.

He remained motionless long enough to alarm his companions. They waited with unspeakable anxiety, wondering if they were doomed to retrace their steps, and return to the summit of Maunganamu.

But John, finding that the noise was not repeated, resumed the ascent of the narrow path of the ridge. Soon they perceived the shadowy outline of the wood showing faintly through the darkness. A few steps more and they were hid from sight in the thick foliage of the trees.

CHAPTER XV FROM PERIL TO SAFETY

THE night favored their escape, and prudence urged them to lose no time in getting away from the fatal neighborhood of Lake Taupo. Paganel took the post of leader, and his wonderful instinct shone out anew in this difficult mountain journey. His nyctalopia was a great advantage, his cat-like sight enabling him to distinguish the smallest object in the deepest gloom.

For three hours they walked on without halting along the far-reaching slope of the eastern side. Paganel kept a little to the southeast, in order to make use of a narrow passage between the Kaimanawa and the Wahiti Ranges, through which the road from Hawkes' Bay to Auckland passes. Once through that gorge, his plan was to keep off the road, and, under the shelter of the high ranges, march to the coast across the inhabited regions of the province.

At nine o'clock in the morning, they had made twelve miles in twelve hours. The courageous women could not be pressed further, and, besides, the locality was suitable for camping. The fugitives had reached the pass that separates the two chains. Paganel, map in hand, made a loop toward the northeast, and at ten o'clock the little party reached a sort of redan, formed by a projecting rock.

The provisions were brought out, and justice was done to their meal. Mary Grant and the Major, who had not thought highly of the edible fern till then, now ate of it heartily.

The halt lasted till two o'clock in the afternoon, then they resumed their journey; and in the evening they stopped eight miles from the mountains, and required no persuasion to sleep in the open air.

Next day was one of serious difficulties. Their route lay across this wondrous region of volcanic lakes, geysers, and solfataras, which extended to the east of the Wahiti Ranges. It is a country more pleasant for the eye to ramble over, than for the limbs. Every quarter of a mile they had to turn aside or go around for some obstacle, and thus incurred great fatigue; but what a strange sight met their eyes! What infinite variety nature lavishes on her great panoramas!

On this vast extent of twenty miles square, the subterranean forces had a field for the display of all their varied effects. Salt springs, of singular transparency, peopled by myriads of insects, sprang up from thickets of tea-tree scrub. They diffused a powerful odor of burnt powder, and scattered on the ground a white sediment like dazzling snow. The limpid waters were nearly at boiling point, while some neighboring springs spread out like sheets of glass. Gigantic tree-ferns grew beside them, in conditions analogous to those of the Silurian vegetation.