It was indeed a spectacle never to be forgotten.

The dense reeds, measuring twelve to fifteen feet in height, had been fired far to the east of the Nest, and as the wind gathered to a gale and the fire got firmer hold, it rolled down upon the doomed place in billows and sheets—a sea of flame that sometimes spouted high into the air and sometimes ran swiftly along the ground.

The reeds crackled and roared like musketry as the fire ate into them, giving out thick volumes of smoke. At first this smoke had passed above the spectators, now it blew into their faces, half choking them and blotting out the sky, and mixed up with it were showers of sparks and fragments of burning reeds brought forward on the wind.

“The house and sheds will soon catch now,” said Leonard; “then they must take refuge in the open spaces, where we can deal with them,” and he nodded towards the gun.

As he spoke tongues of flame darted into the air, first from the thatch of the shed, then from the roof of the Nest. They were afire.

“We must be careful, Baas,” said Otter, “or the slave-shelters behind us will burn also, and all those in them.”

“Heavens! I never thought of that,” answered Leonard. “Here, Father, if you wish to do a good work, take some of these people and the buckets they use to water the slaves. Let three or four men get on to each roof and extinguish the sparks as they fall, while others bring them water from the moat.”

The priest sprang up and set to the task, at which he laboured gallantly for two long hours. Had it not been for his efforts, the sheds and the slaves in them must have been burnt, for the sparks fell thick upon the dry thatch, which caught again and again.

Now the sights and sounds grew more and more fearful. Maddened with fear, the remainder of the slave-drivers and their servants rushed from the flaming buildings, striving to escape from the fire. Some flung themselves desperately into the aloes and prickly-pears on the inner rampart, and, climbing the palisade beyond, escaped into the marsh, while some collected on the open space, and at these the gun was fired from time to time when the smoke lifted. Others again ran to the dike of the slave camp begging for mercy, there to be shot by Otter, who never wearied in his task of revenge. From behind them also rose the hideous cries of the slaves, who believed that they were about to be burned alive, and screamed as they dragged at their manacles.

“Oh, it is like hell!” said Juanna to Leonard, as she buried her face in the grass that she might see no more, and to escape the suffocating smoke. She was right.