A Topic of Moral Theology
Duelling (Can. 2351)
The excommunication incurred by duellists, their seconds, and those who assist.
Penalty for Duelling — in Life and Bodily Integrity (Fifth Commandment)
Also asked about as…
excommunication for duelling (ed.)
In the index as Clerics · Duelling · Vow
In the manuals
Read the manuals side by side → — each work's whole treatment in its own column
A Manual of Moral Theology for English-Speaking Countries
Vol. II, Bk. X, Pt. III, Ch. I, C.—Excommunications Simply Reserved to the Holy See, n. 26 — Duellum.—A single combat with deadly weapons undertaken. by agreement. Those who actually fight or challenge, or accept a duel, or afford any assistance or favour to those who do, incur this censure. Spectators of set pu… Read in context →
Synopsis of Moral and Pastoral Theology
Vol. II, On Ecclesiastical Censures, nn. 1182 & 1183 (2 passages — hover a number to read it)
Treated under the broader heading Excommunications Simply Reserved to the Holy See — Noldin, Summa of Moral Theology · Wouters, Manual of Moral Theology · Gury-Ballerini, Compendium of Moral Theology (8th ed., 1884) · Marc, Institutiones Morales · Konings, Theologia Moralis — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)