William Steinway’s diary: “Wertheimber comes in, asks us to guarantee Essipoff’s salary of 100.000 francs and $5000 Dollars for his work. Albert is unwilling to do so, so I telegraph to Theodore “Wertheimer demands Guaranteeing Essipoff’s Salary 100.000 francs 100 Concerts 5000 $ for managing answer”. This is the first time William Steinway mentiones Russian pianist Annette Essipoff in his diary.