After a brief reference to Frege's distinction between Merkmal (mark) and Eigenschaft (property) of a concept (5.1), the philosophical significance of this distinction is pointed out, first, in general (5.2) and secondly, in the particular cases of the first antepredicamental rule (5.3) and the so-called "triplex status naturae" (5.4). Higher predicates could not be added easily to the standard Aristotelian predication theory (5.32) and they seem to have had a tendency to "descend" to the first-level predicates (5.5).