The Code of Honor: Rules for the Government of Principals and Seconds in Duel

"[...]cases, because no personal offence transpired. "Rule 7.—But no apology can be received, in any case, after the parties have actually taken their ground, without exchange of fires. "Rule 8.—In the above case, no challenger is obliged to divulge the cause of his challenge, (if private,) unless required by the challenged to do so before their meeting. "Rule 9.—All imputations of cheating at play, races, &c, to be considered equivalent to a blow; but may be reconciled after one shot, on admitting their falsehood, and begging pardon publicly. "Rule 10.—Any insult to a lady under a gentleman's care or protection, to be considered as, by one degree, a greater offence than if given to the gentleman personally, and to be regulated accordingly. "Rule 11.—Offences originating or accruing from the support of a lady's reputation, to be considered as less unjustifiable than any other of the same class, and as admitting of lighter apologies by the aggressor; this to be determined by the circumstances of the case, but always favorably to the lady. "Rule 12.—In simple unpremeditated rencontres with the small sword or couteau-de-chasse, the rule is, first draw, first sheathe; unless blood be drawn: then both sheathe, and proceed to investigation. "Rule 13.—No dumb-shooting, or firing in the air, admissible in any case. The challenger ought not to have challenged without receiving offence; and the challenged ought, if he gave offence, to have made an apology before he came on the ground: therefore, children's play must be dishonorable on one side or the other, and is accordingly prohibited.[...]".