et ideo perquire quomodo ad eum pervenias et recipias ab eo supra memoratum pondus argenti et restituas ei chirografum suum

therefore inquire thou busily, how thou shalt come to him, and receive thou of (or from) him the foresaid weight of silver, and restore to him his obligation. [and therefore ensearch, what manner to him thou come, and receive of him the above-mentioned weight of silver, and restore to him his writ.]