He also met again with Huygens who gave him a reading list including works by Pascal, Fabri, Gregory, Saint-Vincent, Descartes and Sluze .
Siya din matugunan muli sa Huygens na ibinigay sa kanya ng isang reading list kasama na ang gumagana sa pamamagitan ng Pascal, Fabri, Gregory, Saint-Vincent, Descartes at Sluze.