Coba jelasin Catatan dari Gustav Hinrichs dong

New York Times (May 22, 1893) "FUSS IN MR. HINRICHS'S BIRDCAGE.; Some of His Songsters Got Favorable Notices and Others Couldn't."

New York Times (Dec. 27, 1905) "MANY APPLY FOR PLACES But Church Choir Singers Are Turned Away"