 After Mortier’s death, his firm eventually passed to the ownership of his son, Cornelis Mortier and Johannes Covens I who together founded Covens & Mortier on November 20, 1721.Covens & Mortier grew to become one of the largest cartography publishing houses of the 18th century.The 27 chart plates from his 1675 Sea atlas were sold at the 1710 auction, to the Amsterdam print seller Luis Renard, who published them under his own name in 1715, and then sold them to Rennier and Joshua Ottens who continued to publish them until the mid-1700s.