Who was Cellarius?
Cellarius’s Hoorn
Andreas Cellarius became rector of the Latin School in Hoorn in 1637, the town of the seafarers on these pages.
Four pages follow people and journeys connected with the town.
The pages
Zwaanendael and the Hoorn Kill
In 1631 Dutch settlers founded Zwaanendael at Lewes, Delaware. Is the Hoorn Kill named for Hoorn? What we know, and how Polaris guided their landfall.
Cape Horn and the Hoorn Islands
Willem Schouten of Hoorn and Jacob Le Maire sailed from Texel in 1615, passed Cape Horn in 1616 and came home in 1617: the route, step by step, with sources.
Pilots and calculators of North Holland
From Hoorn to Alkmaar, people in North Holland charted seas, calculated almanacs and made instruments. Nine of them, what the sources show, and what they don't.
The Golden Compass of Hoorn
A pilot from Hoorn patented an instrument in 1597 that was to read the compass deviation from the sun. How it worked, a calculator, and where the sources differ.
Willem Bontekoe of Hoorn
The Nieuw Hoorn explodes in 1619; a chart cut in a plank, two blue mountains and a compass variation of 22 degrees. From his own journal.