...on the slides suggest a lecturer from the Netherlands. It is quite possible, that the slides of the 1860th were used by a lecturer in Germany before they were later sold into the Netherlands, as there are also German descriptions on the frames. At the time the pictures represented a small fortune and reselling was a natural practice. When today the slides look oversized, the large size was among the most famous lecturers among them Friedrich August Böttcher or Paul Hoffmann very common in their time.
A remarkable ensemble of about thirty slides. The lecturer used for the projection of the slides a lantern from the workshop of Andre Krüss in Hamburg.