"It is a city of the genii," said Massinger, as he watched the guide apply a match to one of a number of metallic-looking mounds, which promptly caught fire, and blazed until quenched. "Where in the world, except a naphtha lake, could one find such an inflammable rest for the sole of one's foot? I believe the place is one-half sulphur, and the other imprisoned fire, which will some day break forth and light up such a conflagration of earth, sky, and water, as the world has not seen for centuries. See here"--as, driving the end of his walking-stick into the crumbling earth, it began to smoke--"it is too hot to hold already." The sun was low, as the little party, having lunched at a bungalow specially erected for tourists, took the homeward route. "There is one more sight, and not the least of the series," said Warwick, as they approached a curious soot-coloured cone, from which, of course, steam ascended, and strange sounds, with intermittent groanings, made themselves heard. "The powers be merciful to us mortals, who can but believe and tremble!" ejaculated Massinger. "What demon's kitchen is this?" "Only a mud volcano," answered Warwick. "Let us climb to the top and look in." The mound, formed by the deposit of dried mud, some ten or twelve feet high, was easily ascended. Open at the top, it was filled with a boiling, opaque mass of seething, bubbling mud. Ever and anon were thrown up fountain-like spurts, which turned into grotesque shapes as they fell on the rim of the strange cauldron. A tiny dab fell upon Erena's _kaitaka_. She laughed. "It will do this no harm; but it might have been my face. A mud scald is long of healing." "What an awful place to fall into alive!" said Massinger, as he gazed at the steaming, impure liquid. "Is it known that any one ever slipped over the edge?" "More than one, if old tales are true," said Warwick; "but they were _thrown in_, with bound hands, after battle. It was a choice way of disposing of a favourite enemy. He did not always sink at once; but none ever came out, dead or alive." "Let us go on!" said Erena, impatiently. "I cannot bear to think of such horrors. I suppose all nations did dreadful things in war." "And may again," interposed Warwick. "These people were not worse than others long ago. The Druids, with their wicker cages filled with roasting victims, were as well up to date as my Maori ancestors. Luckily, such things have passed away for ever." "Let us trust so," said Massinger, feelingly. Erena made no answer, but walked forward musingly on the track which led in the direction of the camp. "Though narrow, it appears to have been much used," he remarked.