23. One of vice-chancellor Jacob Ulfeldt's earliest book purchases. Simon Verepæus: Praeceptiones de verborum et rerum copia, Cologne 1582.

In the 1660s Frederik III acquired a large number of private libraries as part of the building up of what turned out to become The Royal Library. One of these libraries had belonged to the Funen nobleman Laurids Ulfeldt, and consisted of almost 3,000 volumes. These included books acquired by his father, vice-chancellor Jacob Ulfeldt, the Younger, whose interests covered a wide field. He was i.a. one of the first Danish noblemen who included Spain in his Grand Tour and learned Spanish.

Among the volumes from his book collection which, thanks to his son Laurids Ulfeld, are now owned by The Royal Library, is a Latin textbook on eloquence 'for school purposes', printed in Cologne in 1582. As it appears from the owner's stamp 'J.W. 1583', Jacob Ulfeldt acquired this textbook immediately upon its publication. He was then 16 years old. The library's copy contains drawings and many added notes that bear witness to the future vice-chancellor's intense usage.