Mme. Hamaker-Heyne, Soprano, with Hermann Martonne, Violin, Paul Kéfer, Cello, and Emmanuel P. Mesthene, Flute Entered from listings in the <a rel="noopener noreferrer" class="external" href="https://chroniclingamerica.loc.gov/lccn/sn83030214/1911-11-12/ed-1/seq-54/" target="_blank">New York Tribune ("Calendar for the Current Week", columns 2-3)</a> and New York Times, and New York Times review. Stated time is approximate. "A CALENDAR OF CONCERTS." New York Times (1857-1922), Nov 12 1911, p. 1. ProQuest. Web. 24 Feb. 2022. "Mme. Hamaker-Heyne's Concert." New York Times (1857-1922), Nov 16 1911, p. 9. ProQuest. Web. 24 Feb. 2022. joint recital 1911-11-15T20:00:00