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.

Or he tries to find out by a questioning and furtive glance whether his wig, blonde or brown, curled or plain, is in its natural position.

Perhaps he looks at his nails to see whether they are clean and duly cut.

Perhaps with a hand which is either white or untidy, well-gloved or otherwise, he twirls his moustache, or his whiskers, or picks his teeth with a little tortoise-shell toothpick.

Or by slow and repeated movements he tries to place his chin exactly over the centre of his necktie.

Or perhaps he crosses one foot over the other, putting his hands in his pockets.

Or perhaps he gives a twist to his shoe, and looks at it as if he thought, “Now, there’s a foot that is not badly formed.”

Or according as he has come on foot or in a carriage, he rubs off or he does not rub off the slight patches of mud which soil his shoes.

Or perhaps he remains as motionless as a Dutchman smoking his pipe.

Or perhaps he fixes his eyes on the door and looks like a soul escaped from Purgatory and waiting for Saint Peter with the keys.

Perhaps he hesitates to pull the bell; perhaps he seizes it negligently, precipitately, familiarly, or like a man who is quite sure of himself.

Perhaps he pulls it timidly, producing a faint tinkle which is lost in the silence of the apartments, as the first bell of matins in winter-time, in a convent of Minims; or perhaps after having rung with energy, he rings again impatient that the footman has not heard him.

Perhaps he exhales a delicate scent, as he chews a pastille.

Perhaps with a solemn air he takes a pinch of snuff, brushing off with care the grains that might mar the whiteness of his linen.