Analysis of information sources in references of the Wikipedia article "Dispositio" in English language version.
But this deficiency was supplied in them by an elaborate knowledge of the art of Speaking; and there was not one of them who was totally unqualified in any of the five [Footnote: Invention, Disposition, Elocution, Memory, and Pronunciation.] principal parts of which it is composed; for whenever this is the case, (and it matters not in which of those parts it happens) it intirely incapacitates a man to shine as an Orator.