Two points--that arrangement is as important as invention in the study of rhetoric and that coherence, vital to arrangement, can be more fully understood through discourse analysis--are argued in this paper. Following a brief review of the literature that stresses the importance of arrangement and the contributions of linguistic research to rhetoric, a call is made for studies that examine the relationship among the three arts of rhetoric--invention, arrangement, and style--with coherence viewed as integral to an understanding of arrangement. A teaching technique for an informal use of discourse analysis in the classroom to introduce composition or literature students to principles of arrangement and to help them with problems of coherence is appended. (AEA)