Of the excuses of him who does not come at a summons.
 If one lawfully summoned does not appear he must be punished, unless he has lawful  grounds of excuse by which he may justify his absence, of which there are many.  We then must see whether he is absent for a necessary and profitable reason or  simply because he does not wish to appear.1 If for a necessary and profitable reason,  as rei publicae causa;2 that he has set out in the army with the lord king in defence  of the patria, by command of the lord king, he is excused, since he is bound to serve  in this way, provided he has not contrived3 [the call], and is not in the service of  another, since he is not bound to that unless he wishes, for the lord king does not  aid such persons except as a matter of grace.4 When one so excuses himself of the  service of the lord king, we must see whether the service was begun before the summons  or after it. If the summons anticipates the service, so that he can appoint an  attorney, has the opportunity to do so and does not, he is not to be aided by such  excuse, because he could send an attorney, [if it were true that one could pass judgment  on the lord king's deed.]5 If the summons does not precede the service, we  must then see whether he may or may not appear conveniently and without danger,  whether he is in military service or occupying an office. If he may come conveniently  he is not excused;6 if he cannot, we must then see whether he can send or not, because  of force majeure. If he can neither come nor send, nor appoint an attorney  because the lord king is not present, he is excused by the service, [But in all these  cases the lord king's will must be looked to rather than strict law.]7 for the service  of the lord king ought to be to the damage of no one,8[and as it ought not to be to  the damage of the tenant, so ought it not to prejudice the demandant.]9 An office,  as that of sheriff or constable, excuses no one, unless in connexion with it some  necessary reason for absence arises unexpectedly: necessary, as the eyre of the  justices, an invasion by the enemy or the like, where his presence is required. Such  reasons are sufficient for excusing one of the service of the lord king, provided that  on every day given by the essoiner of the service of the lord king the essoinee has  his warrant, the lord king's