Question: Laura Don's son wrote a libretto for an operetta composed by which conductor?

Related documents: [0]  [DOC] Laura Don (February 20, 1852 – February 10, 1886) was the pseudonym of Anna Laura Fish, an American actress, stage manager, playwright and artist whose life was taken by tuberculosis while still in her early thirties. She wrote the play "A Daughter of the Nile", that found its greater success after her death, and was the mother of the writer Glen MacDonough ("Babes in Toyland"). [END] 
[1]  [DOC] Babes in Toyland is an operetta composed by Victor Herbert with a libretto by Glen MacDonough (1870–1924), which wove together various characters from Mother Goose nursery rhymes into a Christmas-themed musical extravaganza. Following the extraordinary success of their stage musical "The Wizard of Oz", which was produced in New York beginning in January 1903, producer Fred R. Hamlin and director Julian P. Mitchell hoped to create more family musicals. MacDonough had helped Mitchell with revisions to the "Oz" libretto by L. Frank Baum. Mitchell and MacDonough persuaded Victor Herbert to join the production. "Babes in Toyland" features some of Herbert's most famous songs – among them "Toyland", "March of the Toys", "Go To Sleep, Slumber Deep", and "I Can't Do the Sum". The theme song "Toyland", and the most famous instrumental piece from the operetta, "March of the Toys", occasionally show up on Christmas compilations. [END]  
Answer: Victor Herbert
Victor Herbert