"I swear by God and all the laws of Rome--" cried Perion.
"Ey, but I am not very popular in Rome," Demetrios interrupted. "I would prefer that you swore by your love for Melicent. I would prefer an oath which both of us may understand, and I know of none other."
So Perion swore as Demetrios requested, and set about the conveyance of Demetrios into King Theodoret's realm.