"I fear," replied Mr. Mayburn, "that the emu, which is the ostrich of Australia, is not formed for carrying burdens, nor tractable enough to submit to the dominion of man. I am anxious to see the bird, though I fear we may obtain no advantage from meeting with it."
In rambling among the caves to fill up the tedious hours, the boys discovered, in a distant branch cavern, a heap of dry wood which had fallen through an opening in the rock, at least fifty feet above them. If this opening were even known to the natives, it could not avail them as a means of descent to the cave, and, much to the mortification of the adventurous boys, it was totally inaccessible from the interior.
"But we can comfort nurse's heart," said Hugh, "by the report that we have found fuel enough for an English winter. And see, Gerald, some of these strong straight sticks will make us a sheaf of arrows, and we can barb them with the fish-bones we preserved. Here's our work for the day."
It was a comfort to Margaret to have the two most restless of the party quietly employed; though Mr. Mayburn objected to the barbing of the arrows, so unnecessary for destroying birds, so cruel if meant for the savages. Wilkins sat down to make a pair of shoes of the skin of the kangaroo, and Jack made more ropes with the remains of the stringy bark. And thus the day of anxiety passed without more alarm.
Another morning dawned through the chinks of the rocky walls, and for some time all was so still, that they began to hope the natives had withdrawn; but before the middle of the day the whole troop presented themselves so suddenly, that they were close to the rocks, and thus, secure from the arrows of the besieged, before they could prevent their approach.
They had come armed with heavy clubs, with which they began violently to batter the walled entrance. This was a formidable mode of attack, and the only mode of defence was to accumulate more stones to strengthen the barrier. Still the men persevered, fresh parties relieving those who were tired; but the defence seemed already shaking; while Margaret, always resolute in difficulties, had herself almost lost the power of consoling her more timid father. Wilkins seemed watching for an opportunity, placed before a narrow crevice in the rock, which was shaded outside by brush, and suddenly they saw him plunge his long knife through the opening against which he had seen one of the natives leaning.
The knife entered the back of the man, who uttered a groan, and fell. He was immediately surrounded by the rest, who examined the wound, and then gazed round, apparently unable to comprehend the nature of this attack from an invisible enemy. Some of the men fled at once, many of them pierced by the arrows the young men sent after them, while others remained to bear away, with care and tenderness, the bleeding body of their companion, who appeared to be mortally wounded. These humane men were respected, even by their opponents, and permitted to retire unmolested; and for the remainder of the day, except for the sounds of mourning from the native women, which, however, gradually became more faint and distant, all continued still and peaceful.
The next morning broke on the besieged party with the melancholy conviction that their fortress was no longer tenable. The spring was already advanced, the air had become hot and parching, and the water was exhausted.
"We must endeavor, under any circumstances," said Arthur, "to procure water, or we must die. I propose that three of us should set out to the nearest pool for a supply, leaving the rest to guard the entrance; and if we are successful, to re-admit us. If the savages should attack and overcome us, then it will be the duty of those left here to close the barrier, leaving us to our fate, and to use every exertion in their power to protect and save the feeble."
Sad as was this necessity, it was imperative, and now the question was, who were to have the honor of joining the "Forlorn Hope," as Hugh termed the expedition. Arthur decided that the party should consist of Hugh, Wilkins, and himself. Jack was too useful to be risked, Gerald too rash to be trusted.