In May 1660, acting on behalf of a consortium of Dutch sugar merchants with plantations in the Caribbean, he offered the Klencke Atlas to the King, hoping to gain favourable trade agreements with Britain.
[3][4] In July 1660, Louis of Nassau arrived in London; his countrymen Simon van Hoorn, curator of the Athenaeum, Michiel van Gogh and the Roman Catholic Joachim Ripperda arrived in November to present to Charles II the Dutch Gift,[5][6] consisting of furniture, a yacht, 24 paintings, and twelve statues to celebrate the Restoration in 1661?
[12] Ernst van Klenck, a merchant trading with Russia, married in 1660 a daughter of Pieter de Carpentier.
In 1661 his brother Herman van Klenck was appointed as a Governor of Formosa (now called Taiwan), but never set a foot on the island when he noticed Fort Zeelandia was occupied by the Chinese soldier Koxinga.
Their brother-in-law William Davidson of Curriehill invited Mary Stuart into his house in July 1660 and seems to have been a spy for Charles II.