1 bound volume entilted "Topographia Insulae Hvennea" handwritten by J. L. E. Dreyer regarding Tycho Brahe and the observatory built on the island of Hven in the late 16th century. It includes 7 maps, two of which are folding. 1 pamphlet titled "Tycho Brahe's Island" by Charles D. Humberd, M.D.