He designed a fountain for the east garden of Hatfield House, and a receipt of May 1612 describes him as the Prince's engineer.
[6] On top was a figure of Pegasus and nearby a female personification of the River Thames in black marble.
He revamped the gardens at Richmond Palace for Prince Henry, and worked at Heidelberg for Elizabeth of Bohemia.
[8] Salomon de Caus carried letters from Viscount Lisle, the Chamberlain of the Queen's Household, to his wife at Penshurst Place.
[9] In 1615, he published Les Raisons des forces mouvantes which showed a steam-driven pump similar to one developed by Giovanni Battista della Porta fourteen years earlier.