DAALEN, VAN; GERRETSON— Twee brieven van Boeboe, d.d. Arnhem 1913 aan ouders. Ze is in huis bij (tante?) Toetie. Manuscripten, 6 pag.

Letter of patent for André Michel Massonnet from Paris for an invention regarding “certain improvements in alloys of metal and of other substances and also in the application of the same to various usefull purposes”.