I added a new page on Madame Henriette Buck. She was a teacher, writer and mezzo-soprano singer who lived at 746 Gilford Street in 1906. She was the widow of Walter Edgar Buck (1864-1902), who was a singer, music teacher, and director of musical productions.
Note: May 31, 2019: I updated the page on Henriette Buck. I included information on her parents and her later life, including her death in 1911.