Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Division, as I have already stated, [*](v. x. 63.) means the division of a group of things into its component parts, partition is the separation of an individual whole into its elements, order the correct disposition
v7-9 p.7
of things in such a way that what follows coheres with what precedes, while arrangement is the distribution of things and parts to the places which it is expedient that they should occupy.