"(Germ.) Berlin. The duet. 31 x 45. The music may be a duet, but the artist very clearly hints that the hearts are beating in unison."
A Catalogue of Paintings in the Gallery of D.W. Powers, Rochester, N.Y. with Explanations and Sketches of Painters by C.C. Merriman. Rochester, N.Y.: E.R. Andrews, Book and Job Printer, Aqueduct Street, 1877.