The Custom House of the marriage state is, of all the expedients prescribed in this second part, that which perhaps demands the most tact and the most skill as well as the most knowledge acquired _a priori_, that is to say before marriage. In order to carry it out, a husband ought to have made a profound study of Lavater’s book, and to be imbued with all his principles; to have accustomed his eye to judge and to apprehend with the most astonishing promptitude, the slightest physical expressions by which a man reveals his thoughts. Lavater’s _Physiognomy_ originated a veritable science, which has won a place in human investigation. If at first some doubts, some jokes greeted the appearance of this book, since then the celebrated Doctor Gall is come with his noble theory of the skull and has completed the system of the Swiss savant, and given stability to his fine and luminous observations. People of talent, diplomats, women, all those who are numbered among the choice and fervent disciples of these two celebrated men, have often had occasion to recognize many other evident signs, by which the course of human thought is indicated. The habits of the body, the handwriting, the sound of the voice, have often betrayed the woman who is in love, the diplomat who is attempting to deceive, the clever administrator, or the sovereign who is compelled to distinguish at a glance love, treason or merit hitherto unknown. The man whose soul operates with energy is like a poor glowworm, which without knowing it irradiates light from every pore. He moves in a brilliant sphere where each effort makes a burning light and outlines his actions with long streamers of fire. These, then, are all the elements of knowledge which you should possess, for the conjugal custom house insists simply in being able by a rapid but searching examination to know the moral and physical condition of all who enter or leave your house--all, that is, who have seen or intend to see your wife. A husband is, like a spider, set at the centre of an invisible net, and receives a shock from the least fool of a fly who touches it, and from a distance, hears, judges and sees what is either his prey or his enemy. Thus you must obtain means to examine the celibate who rings at your door under two circumstances which are quite distinct, namely, when he is about to enter and when he is inside. At the moment of entering how many things does he utter without even opening his mouth! It may be by a slight wave of his hand, or by his plunging his fingers many times into his hair, he sticks up or smoothes down his characteristic bang. Or he hums a French or an Italian air, merry or sad, in a voice which may be either tenor, contralto, soprano or baritone. Perhaps he takes care to see that the ends of his necktie are properly adjusted. Or he smoothes down the ruffles or front of his shirt or evening-dress.