Von Petkum, Hermann, active 1699-1723, Envoy of the Duke of Holstein-Gottorp to The Hague; alias 'Le Sieur Rivièré'

1. Von Petkum, Hermann, active 1699-1723, Envoy of the Duke of Holstein-Gottorp to The Hague; alias 'Le Sieur Rivièré'
2. Radial Graph