Two letters regarding portraits of Phillippe le Roy by van Dyck, as follows:
[1] Handwritten letter ([19] May 1925), written in German, from Cornelis Hofstede de Groot to [Karl] Haberstock.
[2] Printed and handwritten certificate of authentication from Cornelis Hofstede de Groot of a portrait of Phillippe le Roy as painted by van Dyck.
Named persons featured:
Bode, Wilhelm 1845-1929
Haberstock, Karl 1878-1956
Hofstede de Groot, Cornelis 1863-1930