‘But there is nothing to be seen,’ replied Serge, turning a little pale.

‘Yes, yes; it must be behind that avenue of chestnut trees on the other side of those bushes.’

Then, on feeling Serge’s arm tremble, she added: ‘But perhaps I am mistaken.... Yet I seem to remember that I suddenly came upon it as I left the avenue. It stopped my way, and was so high that I felt a little afraid. And a few steps farther on, I came upon another surprise. There was a huge hole in it, through which I could see the whole country outside.’

Serge looked at her with entreaty in his eyes. She gave a little shrug of her shoulders to reassure him, and went on: ‘But I stopped the hole up; I have told you that we are quite alone, and we are. I stopped it up at once. I had my knife with me, and I cut down some brambles and rolled up some big stones. I would defy even a sparrow to force its way through. If you like, we will go and look at it one of these days, and then you will be satisfied.’

But he shook his head. Then they went away together, still holding each other by the waist; but they had grown anxious once more. Serge gazed down askance at Albine’s face, and she felt perturbed beneath his glance. They would have liked to go down again at once, and thus escape the uneasiness of a longer walk. But, in spite of themselves, as though impelled by some stronger power, they skirted a rocky cliff and reached a table-land, where once more they found the intoxication of the full sunlight. They no longer inhaled the soft languid perfumes of aromatic plants, the musky scent of thyme, and the incense of lavender. Now they were treading a foul-smelling growth under foot; wormwood with bitter, penetrating smell; rue that reeked like putrid flesh; and hot valerian, clammy with aphrodisiacal exudations. Mandragoras, hemlocks, hellebores, dwales, poured forth their odours, and made their heads swim till they reeled and tottered one against the other.

‘Shall I hold you up?’ Serge asked Albine, as he felt her leaning heavily upon him.

He was already pressing her in his arms, but she struggled out of his grasp, and drew a long breath.

‘No; you stifle me,’ she said. ‘Leave me alone. I don’t know what is the matter with me. The ground seems to give way under my feet. It is there I feel the pain.’

She took hold of his hand and laid it upon her breast. Then Serge turned quite pale. He was even more overcome than she. And both had tears in their eyes as they saw each other thus ill and troubled, unable to think of a remedy for the evil which had fallen upon them. Were they going to die here of that mysterious, suffocating faintness?

‘Come and sit down in the shade,’ said Serge. ‘It is these plants which are poisoning us with their noxious odours.’