"In Groningen, Uffenbach is in the library of professor Isinck. Isinck shows the brothers an Arabian prayer book from the library of professor Braun. Isinck tells them that the mayor Menso Alting is writing a Commentarium and that the Prince-elector of the Pfalz has bought Smith's [Smetius's] collection of antiquities in Nijmegen. In the afternoon, the Uffenbach brothers visit the university library. Uffenbach describes the library."