Van Houten
In 1835 Coenraad van Houten married Hermina van Houten (unrelated) from Groningen. In 1850 he moved his production from a windmill in Leiden to a steam factory in Weesp. By that time he was exporting chocolate to England, France, and Germany. In 1866 John Cadbury traveled to Weesp to buy a Van Houten press, but did not use it in his manufacturing until 1875.