found: Conquering Cupid, 1908DLC copy theater program, Belasco Theatre, Washington, D.C. performance (orchestration by John Itzel)
found: LC database, October 11, 2012(hdg.: Itzel, John )
found: Itzel, John. Song of the Woman's College of Baltimore, 1896:caption (music by John Itzel)
found: Adam Itzel Jr. and John Itzel orchestral arrangements, Arthur Friedheim Library Special Collections, Peabody Institute, The Johns Hopkins University, 1879-1933:finding aid (John Itzel; composer, arranger, and conductor specializing in light operas; born 1868 in Baltimore; died 1933) - https://archivesspace.library.jhu.edu/repositories/4/resources/1250