It very often happens that two or more dreams in the same night stand in some sort of relation to one another. In the Traumdeutung Freud speaks of the way in which successive dreams which all contain the same latent content grow progressively clearer. Often, however, the relation between pairs of dreams is still closer: not only is the content connected but there is also a dynamic or, more correctly, an economic connection. A certain dynamic relation between pairs or series of dreams which express the same wish is nearly always present. The following is the simplest type of a relation of this sort. The first dream may, for instance, express the incest-wish, the sexual act being disguised symbolically. For example: 'I am driving in a carriage with my mother.' In the second dream the act is disguised less, or not at all, but the incestuous object is replaced by a harmless one. The two dreams are then complementary to one another and permit, as it were,