"Right," exclaimed Alan, "that'll be easy—a rope ladder."

It was almost dark and the boys were covered with the penetrating grime of the long undisturbed "khiva." A meager wash up and supper and rest were in order. But Ned said:

"By morning the Cibola will be in collapse. It is a valuable machine, and it ought not be left out here on this point unprotected from the seasons. We shall probably never see it again, but while we can move it let's tow it over in front of the temple and put the bag and engine and instruments in the protected room."

It was not a difficult task. With no great effort the car was half carried and half dragged down the slope and then to the clearing in the pine grove where the boys soon made a new camp. To complete their work the big bag of the balloon was untied from the car and drawn, half inflated, into the pathway leading to the temple door. Then, with no small regret, the boys opened the escape valve, and in a few minutes the collapsed Cibola was stretched like the cast off skin of a snake along the sandy pathway, ready to be rolled up and compactly stored away.

CHAPTER XXIX

THE GOLDEN EAGLE OF THE AZTECS

In the morning the boys went at their task with renewed vigor. Inventory was first taken of the stores and provisions. There was enough food for about six days, if used with care. Of water there was a supply apparently for a little longer period. But the choking dust of the "khiva" made bathing almost a necessity, and, used in this way, even sparingly, the supply would not last over two days.

"No more baths until we go down into the valley," ordered Ned. "Cleanliness would be a comfort, but we'll have to be uncomfortable."

Permanent camp was made in the cabin of the dirigible. In arranging this all the machinery, the engine, the blower, the dynamo, the reconverter and the aeroplanes, the rudder and the propeller were unmounted, and the smaller articles made ready for storing in the temple entrance. There were four casks of gasoline left unused. As these were being carried to the temple Ned suddenly exclaimed: