 Bertrand Russell, to whom many current structured propositions theorists attribute the idea of structured propositions, held various views about the nature of propositions over the course of his career. However, the account of propositions held by Russell that is thought by many to be the progenitor of current accounts of structured propositions is the one Russell defended in Russell [1903]. We shall confine our attention to that account here. Russell differed with Frege both on what the constituents of structured propositions are and on what binds them together in the proposition. Russell uses the word ‘term’ for constituents of propositions. Thus he writes: