The visitors to Agrando found plenty to amuse and interest them during their stay. The palace gardens alone were a never-ending source of wonder and delight to the two chums. Rumour had not exaggerated when it had spread reports of the marvels to be seen there. The friends spent a good deal of their time exploring and investigating—for the gardens were of very great extent—and every day they came upon something fresh. At the beginning, Monck had given them this curious warning: ’Kazzaro has asked me to put you on your guard,’ said he. ’King Agrando remembers the dangers which you, Gerald, so narrowly escaped during our journey in the _Ivenia_; and he does not wish that a similar unhappy occurrence should cast a reflection upon any of his people here. So he has instructed Kazzaro to remind me that there are many specimens and scientific curiosities in the gardens which may be dangerous to strangers unacquainted with their characteristics—not merely among the animals, and reptiles, and so on, he says, but even amongst the trees and plants. For King Agrando has devoted an immense amount of money and trouble to collecting and cultivating specimens of most out-of-the-way kinds, some of them with qualities never known or heard of before. Apart from this consideration, you have the king’s permission to go about freely wherever you choose!’ Later on, Gerald asked Jack his private opinion of this warning. ’What does it mean?’ he asked doubtfully. ’Is it genuine, do you think, or does it conceal some crafty trick?’ ’Sounds straightforward enough!’ Jack declared. ’Where can the trick come in?’ ’I don’t know,’ Gerald mused. ’I have no right, perhaps, to suspect any trickery; yet, somehow, I don’t trust the Ogre!’ ’No more do I, for that matter! We’ll keep our eyes open!’ said Jack. A few days later, Alondra, wandering alone in the gardens, one morning, came upon an immense round glass-house, the door of which, he noticed, was standing open for the first time. He had paused at the place two or three times before; but the door had always been shut and locked. Moreover, there was a label upon it, which read: ’Private. Contents Dangerous.’ Naturally, such a placard had aroused his curiosity, and he had made attempts to see what was inside; but everywhere the glass was screened off within, and he could discover nothing. Here, this morning, was an opportunity to see for himself what the mysterious ’contents’ were. He had his trident with him—he had carried it every day in consequence of the warning that had been given—so what had he to fear?