Through condensation of the dream certain constituent parts of its
content are explicable which are peculiar to the dream life alone, and
which are not found in the waking state. Such are the composite and
mixed persons, the extraordinary mixed figures, creations comparable
with the fantastic animal compositions of Orientals; a moment's thought
and these are reduced to unity, whilst the fancies of the dream are ever
formed anew in an inexhaustible profusion. Every one knows such images
in his own dreams; manifold are their origins. I can build up a person
by borrowing one feature from one person and one from another, or by
giving to the form of one the name of another in my dream. I can also
visualize one person, but place him in a position which has occurred to
another. There is a meaning in all these cases when different persons
are amalgamated into one substitute. Such cases denote an "and," a "just
like," a comparison of the original person from a certain point of view,
a comparison which can be also realized in the dream itself. As a rule,
however, the identity of the blended persons is only discoverable by
analysis, and is only indicated in the dream content by the formation of
the "combined" person.

The same diversity in their ways of formation and the same rules for its
solution hold good also for the innumerable medley of dream contents,
examples of which I need scarcely adduce. Their strangeness quite
disappears when we resolve not to place them on a level with the objects
of perception as known to us when awake, but to remember that they
represent the art of dream condensation by an exclusion of unnecessary
detail. Prominence is given to the common character of the combination.
Analysis must also generally supply the common features. The dream says
simply: _All these things have an "x" in common_. The decomposition of
these mixed images by analysis is often the quickest way to an
interpretation of the dream. Thus I once dreamt that I was sitting with