Two days later a very low tide laid the rocks quite bare. Lazare, brimming over with the wild enthusiasm which always filled him at the outset of any of his new schemes, was impatient to be off to the sea-weed. So away he hurried, with bare legs and just a canvas jacket over his bathing-costume. Pauline went with him to share in his investigations. She, too, wore a bathing-costume and the heavy shoes which she used when bound on shrimping expeditions. When they had got about half a mile from the cliffs, and had reached the centre of the spreading tract of sea-weed, still streaming with the water of the ebbing tide, the young man's enthusiasm burst forth as if he were only now discovering that immense crop of marine plants over which he and Pauline had rambled a hundred times before. 'Look! look!' he cried; 'what money we shall make out of it all; and nobody has ever thought of making any use of it before!' Then he began to point out to her the different species with gleeful pedantry; the zosterias, of a delicate green and similar to long hair, stretching far away in spreading lawns; the ulvæ, with large lettuce-like leaves of glaucous transparency; the serrated fuci and the bladder-bearing fuci, which grew in such thick profusion that they enveloped the rocks like thick moss. As they followed the tide, too, they came upon species of greater size and stranger forms, such as various kinds of laminaria, especially that known as Neptune's Belt, a girdle-like strip of greenish leather, with wrinkled edges, that looked as though it were made to circle some giant's waist. 'What wealth there is going to waste here!' exclaimed Lazare. 'How stupid people are! In Scotland folks are sensible enough to make some use of the ulvæ at any rate, for they turn it into food and eat it. We here just use the fuci to pack fish with, and the zosteria to stuff mattresses; and as for the rest, it is simply turned into manure; and all that science does is to burn a few cartloads to extract soda from the residue.' Pauline, in the water to her knees, felt perfectly happy amidst all the sharp saltness; and her cousin's explanations interested her extremely. 'So do you intend to distil all this?' she asked. Lazare was very much amused with the word 'distil.' 'Yes; distil it, if you like to call it so. But the process is a very complicated one, as you'll see. However, mark my words. We have subjugated terrestrial vegetation to our use; we eat vegetables and fruit, and avail ourselves in other ways of trees and plants, don't we? Well, perhaps we shall find that we can turn marine vegetation to still greater profit when we seriously try to do so.'