“Why, what’s the matter, Popinot?” asked Cesar, as he saw Anselme blush.

“Monsieur, it is the joy of having found a shop, a back-shop, kitchen, chambers above them, and store-rooms,—all for twelve hundred francs a year, in the Rue des Cinq-Diamants.”

“We must take a lease of eighteen years,” said Birotteau. “But let us start for Monsieur Vauquelin’s. We can talk as we go.”

Cesar and Popinot got into the hackney-coach before the eyes of the astonished clerks, who did not know what to make of these gorgeous toilets and the abnormal coach, ignorant as they were of the great project revolving in the mind of the master of “The Queen of Roses.”

“We are going to hear the truth about nuts,” said Cesar, half to himself.

“Nuts?” said Popinot.

“There you have my secret,” said the perfumer. “I’ve let loose the word nuts,—all is there. The oil of nuts is the only oil that has any real effect upon hair. No perfumer has ever dreamed of it. I saw an engraving of Hero and Leander, and I said to myself, If the ancients used all that oil on their heads they had some reason for it; for the ancients are the ancients, in spite of all the moderns may say; I stand by Boileau about the ancients. I took my departure from that point and got the oil of nuts, thanks to your relation, little Bianchon the medical student; he told me that at school his comrades used nut oil to promote the growth of their whiskers and mustachios. All we need is the approval of Monsieur Vauquelin; enlightened by his science, we shall mislead the public. I was in the markets just now, talking to a seller of nuts, so as to get hold of the raw material, and now I am about to meet one of the greatest scientific men in France, to get at the quintessence of that commodity. Proverbs are no fools; extremes meet. Now see, my boy, commerce is the intermediary between the productions of the vegetable kingdom and science. Angelique Madou gathers, Monsieur Vauquelin extracts, we sell an essence. Nuts are worth five sous a pound, Monsieur Vauquelin will increase their value one hundredfold, and we shall, perhaps, do a service to humanity; for if vanity is the cause of the greatest torments of mankind, a good cosmetic becomes a benefaction.”

The religious admiration with which Popinot listened to the father of Cesarine stimulated Birotteau’s eloquence, who allowed himself to expatiate in phrases which certainly were extremely wild for a bourgeois.

“Be respectful, Anselme,” he said, as they reached the street where Monsieur Vauquelin lived, “we are about to enter the sanctuary of science. Put the Virgin in full sight, but not ostentatiously, in the dining-room, on a chair. Pray heaven, I may not get mixed up in what I have to say!” cried Cesar, naively. “Popinot, this man has a chemical effect upon me; his voice heats my stomach, and even gives me a slight colic. He is my benefactor, and in a few moments he will be yours.”

These words struck Popinot with a cold chill, and he began to step as if he were walking on eggs, looking nervously at the wall. Monsieur Vauquelin was in his study when Birotteau was announced. The academician knew that the perfumer and deputy-mayor was high in favor, and he admitted him.