Investing in land and lordships, he acquired extensive rights and possessions in the area south of Dordrecht, including seigneuries in Geertruidenberg (where he founded a Carthusian monastery), Dubbelmonde, Almonde, Drimmelen, Raamsdonk, Waspik, Munsterkerk, Zonzeel, Oosterhout and Dongen. He undertook diking and drainage works to make these lands more profitable, but also encouraged peat extraction from tidal lands on a scale that is likely to have contributed to the extent of St. Elizabeth's flood in 1421.