Philippe Flon was a conductor at the Metropolitan Opera, and can be heard in a number of Mapleson Cylinders.

Mediafire link for Mapleson cylinders

(These are zip files – left click the link, download the files, then unzip when downloaded)

As the LP notes, this is not high-fidelity sound. This is IRCC LP7006, issued in 1955, containing transfers of a number of Mapleson Cylinders, recorded live from the stage of the Metropolitan Opera House from 1901 to 1903.

Flon can be heard on the following tracks:

1. Donizetti - La Fille du Régiment - Rataplan (Act 2) and Duet (Act 1)
Marcella Sembrich, soprano; Marie van Cauteren, soprano; Thomas Salignac, tenor; Charles Gilibert, baritone. Philippe Flon, conductor
30/1/1903

3. Leoncavallo - Pagliacci - Opening Act 2
Antonio Scotti, baritone. Philippe Flon, conductor
30/1/1903

4. Meyerbeer - Les Huguenots - Duet Act 3 (four fragments)
Johanna Gadski, soprano; Edouard de Reszke, bass. Philippe Flon, conductor
24/1/1903

13. Verdi - La Traviata - Un dì felice, eterea
Dame Nellie Melba, soprano; Andreas Dippel, tenor; Aristide Masiero, tenor. Philippe Flon, conductor
16/3/1901

14. Meyerbeer - L'Africaine - Duet, Act 4 (Three fragments)
Lucienne Bréval, soprano; Jean de Reszke, tenor. Philippe Flon, conductor
15/3/1901

15. Meyerbeer - Les Huguenots - A ce mot tout s'anime
Suzanne Adams, soprano; Louise Homer, contralto. Philippe Flon, conductor
1/3/1902
(Credited on record sleeve as Melba, 11th March 1901, conducted by Flon)