I answer that, Tully, in his Rhetoric (De Invent. Rhetor. i), gives seven circumstances, which are contained in this verse:
"Quis, quid, ubi, quibus auxiliis, cur, quomodo, quando---
Who, what, where, by what aids, why, how, and when." For in acts we must take note of "who" did it, "by what aids" or "instruments" he did it, "what" he did, "where" he did it, "why" he did it, "how" and "when" he did it. But Aristotle in Ethic. iii, 1 adds yet another, to wit, "about what," which Tully includes in the circumstance "what."
The reason of this enumeration may be set down as follows. For a circumstance is described as something outside the substance of the act, and yet in a way touching it. Now this happens in three ways: first, inasmuch as it touches the act itself; secondly, inasmuch as it touches the cause of the act; thirdly, inasmuch as it touches the effect. It touches the act itself, either by way of measure, as "time" and "place"; or by qualifying the act as the "mode of acting." It touches the effect when we consider "what" is done. It touches the cause of the act, as to the final cause, by the circumstance "why"; as to the material cause, or object, in the circumstance "about what"; as to the principal efficient cause, in the circumstance "who"; and as to the instrumental efficient cause, in the circumstance "by what aids."