There are various kinds of "business", and of different purpose. The old-fashioned stage director used to invent dozens of meaningless things for actors to do, merely to "fill in", or give the appearance of activity. It is related that, when the farce, "It's All Your Fault", was being rehearsed, the man in charge insisted that Charles Dickson, who was supposed to be calling at the room of a friend, should "fill in" a long speech by taking a brush from a bureau drawer and brushing his hair.
"But", protested Mr. Dickson, "I'm simply visiting. I can't use another man's brush."
"Can't help that!" said the director. "There are long speeches here, and you must do _something_ while they are being spoken."
This kind of stage management, however, is no longer general. It is understood now that the best way to make a speech impressive is to stand still and speak it, so that actors are not often given by-play without some good reason.
"Business" may supply "atmosphere", as the spectacle of a man rubbing his ears and blowing on his hands helps create the illusion of intense cold. In the original production of "In the Bishop's Carriage", Will Latimer, impersonated by a very slight young fellow, was supposed to cowe Tom Dorgan, a thug of enormous bulk. The scene never carried conviction, until our stage director hit upon an ingenious bit of "business." He put a telephone on the table that stood between the two men. Dorgan made a movement toward Latimer. Latimer, without flinching or taking his eyes from Dorgan's face, laid his hand on the telephone. That gesture suggested a world of power, the police station within reach, law and society standing back of Latimer. It saved the situation.
Much "business" is obvious and essential, as Voysin's fumbling in his wife's dressing table, in "The Thief", since this fumbling leads to the discovery of the bills upon the purloining of which the play is built. If a small article is to be used importantly in a performance it must be "marked", so that the audience will know what it is and so that it will not seem to have appeared miraculously to fit the occasion. The paper cutter falls off the table in the first act of "The Witching Hour", not by accident, but by carefully thought out design, so that the audience will know where the instrument is and recognize it when Clay Whipple uses it to kill Tom Denning. "Business", in a word, may be the smashing of a door or the picking up of a pin. It is the adornment that makes an otherwise bald and unconvincing narrative seem real; that translates mere dialogue into the semblance of every-day life.