1917 Book cover for Hildebrand, Camera Obscura, Ninth and twentieth edition, (Haarlem: De Erven F. Bohn)
Book cover Project Gutenberg https://www.gutenberg.org/files/15975/15975-h/15975-h.htm
Nicolaas Beets (13 September 1814 - 13 March 1903) was a Dutch theologian, writer and poet. He published also under the pseudonym Hildebrand. His most famous work is Camera Obscura, which he wrote under his pseudonym during his student years. (Wikipedia)
