"I can understand his warning now," he muttered to himself. "He knew they were going to attack us from the tunnel. But why should he have wished to save us?"

The more he considered the matter the more puzzled he became. Then he observed quite a number of the oddly garbed natives join their companion on the hilltop. Again and again the dull boom of the heavy gelignite charges echoed out on the still air, and after each ponderous report a fresh group seemed to gather up aloft until Bob could count fully fifty of them.

"I reckon this here circus sort o' disturbs them," grunted Emu Bill.

Mackay looked anxious. "I hope there's no more o' them," he remarked gravely. "We've struck a bigger-sized tribe than we calculated on, Bill, an' we'll have to be vera cautious."

At last the tomb was completed and reverently they wrapped the dead man in his blanket and carried him to his last earthly rest. No tears now dimmed their eyes, their sorrow was deep set in the heart; it had passed the mere emotional stage, and could find relief only in strenuous action. Then they stood around the open grave with bowed heads, while Mackay repeated a brief prayer. Long afterwards Bob remembered the quiet dignity of his utterance, the simple eloquence of his tribute, and the whole pathetic scene would return to him with all its overwhelming memories. When he had finished, they shovelled in the loose sand and rubble in solemn silence, and built up a cairn over the top.

The natives from their position of vantage had gazed stolidly down on them throughout the entire ceremonial; but now they dispersed, leaving but one solitary watcher on the height.

"We'll have to plant these natives now," said Mackay; "we can't leave them lying like that."

They walked over and surveyed the bodies again, and the Shadow taking the long opossum robe from one of them, threw it over his own shoulders with a chuckle of satisfaction.

"I reckon this here ornament should just fit me," said he, turning round for inspection.

Emu Bill laughed hoarsely. "Throw the wretched thing away, Shad," he growled. "Ye doesn't want to wear a nig's wardrobe, does ye?"