because the demandant raises the exception of bastardy against C., by replicating  against her, one who alleges, by way of exception, that she is legitimate and the heir  and in seisin, that she is a bastard, the demandant will have to prove the bastardy.  What is said above about the bastardy of him who is born before marriage, may also  be said of him who is born so long after the death of his ancestor that it is impossible  for him to be the son and heir.1 There is also another similar writ on the same matter  against a tenant, male or female, who was born of an unlawful marriage, as of an  adulteress, that is, where one had two wives, one de jure and the other de facto, and  the child of the unlawful marriage is in seisin. Cognisance of a case of that kind belongs  to the ecclesiastical, not to the secular forum.
Writ when bastardy is raised against one in seisin.
 The king to such a bishop, greeting. Know that when A. claimed against B. so much  land with the appurtenances in such a vill as his right, and the same B. came into the  same court and said that he was in seisin of the same land as of that which descended  to him hereditarily from a certain C., his father, whose heir he is, as he says, the same  A. objected against the same B. in our court that he can have no right in that land  because he is a bastard and born of an adulteress, asserting that he is the lawful son  and heir of the said C. Since cognisance of such matters belongs to the ecclesiastical  forum, we order you, having called together those who are to be called etc. (as above).  There is also another exception of bastardy which is to be transmitted to court  christian and not determined in the royal court, whether it is put forward by the  demandant against the tenant, or the tenant against the demandant, when this  reason is alleged, that the father of such a one never married his mother, whether he  is demandant or tenant. Let this writ then issue.
That his father never married his mother.
 The king to such a bishop, greeting. Know that when A. in our court before etc.  claimed against B. so much land with the appurtenances in such a vill as his right,  the same B. came into the same court and said that the aforesaid A. could claim no  right in that land because he is a bastard, because C., his father, whose heir he claims  to be, never married his mother. And since cognisance of such bastardy belongs to the  ecclesiastical forum, we order you, having called together those who are to be called  before you etc.