We have not exhausted our valuation of the dream work. In addition to condensation, displacement, and definite arrangement of the psychical matter, we must ascribe to it yet another activity — one which is, indeed, not shared by every dream.

I shall not treat this position of the dream work exhaustively; I will only point out that the readiest way to arrive at a conception of it is to take for granted, probably unfairly, that it only subsequently influences the dream content which has already been built up. Its mode of action thus consists in so coördinating the parts of the dream that these coalesce to a coherent whole, to a dream composition. The dream gets a kind of fa�ade which, it is true, does not conceal the whole of its content. There is a sort of preliminary explanation to be strengthened by