Tolong jelaskan mengenai Catatan dari Putri Helena, Adipatni Albany

Treaty between Her Majesty and the Prince of Waldeck and Pyrmont, for the Marriage of His Royal Highness Prince Leopold, Duke of Albany, with Her Serene Highness the Princess Helen Frederica Augusta of Waldeck and Pyrmont - 20 April 1882 - British State Papers (BSP) Volume 73 Page 33

Putri dari Waldeck and Pyrmont