Johann Nepomuk Hummel, Brief an Franz Gerhard Wegeler in Koblenz, Stuttgart, 13. März 1818, Autograph

Johann Nepomuk Hummel is planning to give a concert in Koblenz with his colleague Anton Kraft on his journey to Hamburg. As he can only spend a few days in Koblenz he asks Wegeler to "have a subscription circulated" in advance to ensure the concert is a success.