“Certainly,” said Pencroft, “a beast of burden would be very useful to us until the captain has made a steam cart, or even an engine, for some day we shall have a railroad from Granite House to Port Balloon, with a branch line to Mount Franklin!”

One day, the 23rd of December, Neb and Top were heard shouting and barking, each apparently trying to see who could make the most noise.  The settlers, who were busy at the Chimneys, ran, fearing some vexatious incident.

What did they see?  Two fine animals of a large size that had imprudently ventured on the plateau, when the bridges were open.  One would have said they were horses, or at least donkeys, male and female, of a fine shape, dove-colored, the legs and tail white, striped with black on the head and neck.  They advanced quietly without showing any uneasiness, and gazed at the men, in whom they could not as yet recognize their future masters.

“These are onagers!” cried Herbert, “animals something between the zebra and the quagga!”

“Why not donkeys?” asked Neb.

“Because they have not long ears, and their shape is more graceful!”

“Donkeys or horses,” interrupted Pencroft, “they are ‘moving powers,’ as the captain would say, and as such must be captured!”

The sailor, without frightening the animals, crept through the grass to the bridge over Creek Glycerine, lowered it, and the onagers were prisoners.

Now, should they seize them with violence and master them by force?  No.  It was decided that for a few days they should be allowed to roam freely about the plateau, where there was an abundance of grass, and the engineer immediately began to prepare a stable near the poultry-yard, in which the onagers might find food, with a good litter, and shelter during the night.

This done, the movements of the two magnificent creatures were left entirely free, and the settlers avoided even approaching them so as to terrify them.  Several times, however, the onagers appeared to wish to leave the plateau, too confined for animals accustomed to the plains and forests.  They were then seen following the water-barrier which everywhere presented itself before them, uttering short neighs, then galloping through the grass, and becoming calmer, they would remain entire hours gazing at the woods, from which they were cut off for ever!

In the meantime harness of vegetable fiber had been manufactured, and some days after the capture of the onagers, not only the cart was ready, but a straight road, or rather a cutting, had been made through the forests of the Far West, from the angle of the Mercy to Port Balloon.  The cart might then be driven there, and towards the end of December they tried the onagers for the first time.

Pencroft had already coaxed the animals to come and eat out of his hand, and they allowed him to approach without making any difficulty, but once harnessed they reared and could with difficulty be held in.  However, it was not long before they submitted to this new service, for the onager, being less refractory than the zebra, is frequently put in harness in the mountainous regions of Southern Africa, and it has even been acclimatized in Europe, under zones of a relative coolness.