Now, nothing was more natural than that Van der Kemp and his guest should be smitten with the same sort of desire which had brought these excursionists from Batavia.  The only thing that we do not pretend to account for is the strange coincidence that they should have been so smitten, and had so arranged their plans, that they arrived at Perboewatan almost at the same time with the excursionists—­only about half an hour before them!

Their preliminary walk, however, through the tangled, almost impassable, forest had been very slow and toilsome, and having been involved in its shadow from daybreak, they were, of course, quite unaware of the approach of the steamer or the landing of the excursion party.

“If the volcano seems quieting down,” said Nigel to his host, “shall you start to-morrow?”

“Yes; by daybreak.  Even if the eruption does not quiet down I must set out, for my business presses.”

Nigel felt much inclined to ask what his business was, but there was a quiet something in the air of the hermit, when he did not choose to be questioned, which effectually silenced curiosity.  Falling behind a little, till the negro came up with him, Nigel tried to obtain information from him, for he felt that he had a sort of right to know at least something about the expedition in which he was about to act a part.

“Do you know, Moses, what business your master is going about?” he asked, in a low voice.

“No more nor de man ob de moon, Massa Nadgel,” said Moses, with an air at once so truthful and so solemn that the young man gave it up with a laugh of resignation.

On arriving at Perboewatan, and ascending its sides, they at last became aware of the approach of the excursion steamer.

“Strange,” muttered the hermit, “vessels don’t often touch here.”

“Perhaps they have run short of water,” suggested Nigel.

“Even if they had it would not be worth their while to stop here for that,” returned the hermit, resuming the ascent of the cone after an intervening clump of trees had shut out the steamer from view.

It was with feelings of profound interest and considerable excitement that our hero stood for the first time on the top of a volcanic cone and gazed down into its glowing vent.

The crater might be described as a huge basin of 3000 feet in diameter.  From the rim of this basin on which the visitors stood the sides sloped so gradually inward that the flat floor at the bottom was not more than half that diameter.  This floor—­which was about 150 feet below the upper edge—­was covered with a black crust, and in the centre of it was the tremendous cavity—­between one and two hundred feet in diameter—­from which issued the great steam-cloud.  The cloud was mixed with quantities of pumice and fragments of what appeared to be black glass.  The roar of this huge vent was deafening and stupendous.  If the reader will reflect on the wonderful hubbub that can be created even by a kitchen kettle when superheated, and on the exasperating shrieks of a steamboat’s safety-valve in action, or the bellowing of a fog-horn, he may form some idea of the extent of his incapacity to conceive the thunderous roar of Krakatoa when it began to boil over.