Val were created during the God War as the elite warriors of the Gods and thereafter, as the caretakers of Mankind.
His papers were edited by his brother Johannes (1605), who published the major book De arcanis rerum publicarum libri sex; there were later editions by Johannes Arnoldi Corvinus (1641), and Martinus Schoock (1668, 1672).
With Gerard de Wassenaer and Pieter de la Court he was one of a group of legal writers with Remonstrant sympathies who commented on reason of state; Corvinus did this in an edition of the De arcanis rerumpublicarum of Arnoldus Clapmarius (1641).