François Valentyn (Valentijn) stayed over at the Cape of Good Hope in 1685, 1695, 1705, and 1714, for a total period of more than 6 months. Shortly before he died, he wrote Oud en Nieuw Oost-Indiën (1724–26) ("Old and New East-India"), a massive work of five parts published in eight volumes and containing over one thousand engraved illustrations and some of the most accurate maps of the Indies of the time.
A portion of the 5th and last part of his Oud en Nieuw Oost-Indiën was dedicated to his observations of the Cape of Good Hope over a 29-year period.
Description of the Cape of Good Hope
with the matters concerning it
2 volumes, reprint (with Dutch on one page and English on the other)
Van Riebeeck Society, Cape Town, 1971
My copies of these volumes are shown below