By alternating the picture of a man and the check he is forging, we have his soliloquy.

When two people talk to each other, it is by lifting and lowering objects rather than their voices.

The collector presents a bill: the adventurer shows him the door.

The boy plucks a rose: the girl accepts it.

Moving objects, not moving lips, make the words of the photoplay.
The old-fashioned stage producer, feeling he is getting nowhere, but still helpless, puts the climax of some puzzling lip-debate, often the climax of the whole film, as a sentence on the screen.