Where the plaintiff considers that the words spoken touch him in his profession or trade, he must always aver in the pleadings that he was carrying on the profession of a physician or surgeon, or the trade of a druggist, at the |135| time the words were spoken. Sometimes this is admitted by the slander itself, and if so, evidence is of course unnecessary in proof of this averment. But in other cases, unless it is admitted on the pleadings, evidence must be given at the trial of the special character in which the plaintiff sues. As a rule, it is sufficient for the plaintiff to prove that he was engaged in the profession or trade, without proving any appointment thereto, or producing a diploma or other formal qualification. For the maxim _omnia presumuntur rite esse acta_ applies. But if the very slander complained of imputes to the medical practitioner that he is a quack or an impostor, not legally qualified for practice; or if the plaintiff aver that he is a physician and has duly taken his degree, then the plaintiff at the trial must be prepared to prove his qualification strictly by producing his diploma or certificate. In some cases the mere production of the diploma will not be sufficient proof of the plaintiff’s having the degree, but it may be necessary to prove that the seal affixed is the seal of a university having power to grant degrees; or in the case of the production of a copy of the diploma, that it has been compared with the original [362]. Whether or no the words were spoken of the plaintiff in the way of his business is a question for the jury to determine at the trial. There should always be an averment in the statement of claim, that the words were so spoken, and it should also be shewn in what manner the words were connected by the speaker with the profession [363].