"Well, let us sit here," he said, and taking Eve's hand, he went to a great baulk of timber lying below the wheels of a paper-mill. "Let me breathe the evening air, and hear the frogs croak, and watch the moonlight quivering upon the river; let me take all this world about us into my soul, for it seems to me that my happiness is written large over it all; I am seeing it for the first time in all its splendor, lighted up by love, grown fair through you. Eve, dearest, this is the first moment of pure and unmixed joy that fate has given to me! I do not think that Lucien can be as happy as I am." David felt Eve's hand, damp and quivering in his own, and a tear fell upon it. "May I not know the secret?" she pleaded coaxingly. "You have a right to know it, for your father was interested in the matter, and to-day it is a pressing question, and for this reason. Since the downfall of the Empire, calico has come more and more into use, because it is so much cheaper than linen. At the present moment, paper is made of a mixture of hemp and linen rags, but the raw material is dear, and the expense naturally retards the great advance which the French press is bound to make. Now you cannot increase the output of linen rags, a given population gives a pretty constant result, and it only increases with the birth-rate. To make any perceptible difference in the population for this purpose, it would take a quarter of a century and a great revolution in habits of life, trade, and agriculture. And if the supply of linen rags is not enough to meet one-half nor one-third of the demand, some cheaper material than linen rags must be found for cheap paper. This deduction is based on facts that came under my knowledge here. The Angouleme paper-makers, the last to use pure linen rags, say that the proportion of cotton in the pulp has increased to a frightful extent of late years." In answer to a question from Eve, who did not know what "pulp" meant, David gave an account of paper-making, which will not be out of place in a volume which owes its existence in book form to the paper industry no less than to the printing-press; but the long digression, doubtless, had best be condensed at first.