Found at the British Library Sound Archive Catalogue:

BERTIE THE BOUNDER
Grossmith, George, Jnr (singer, male)
Item title: Bertie the bounder
Performer: Grossmith, George, Jnr (singer, male)
Original issue no.: Re-issue of 78 rpm disc probably Gramophone 02255.
Item notes: Label: Clarke
Item notes: The show "Our Miss Gibbs" was jointly composed by Lionel Monckton
Item notes: and Ivan Caryll.
Item notes: This song is listed as being part of that show but as no composer
Item notes: called "Clarke" is mentioned in connection with it, it has been
Item notes: assumed that the song was composed separately and later
Item notes: incorporated.
FIND FORMAT: 2LP0070306
FIND FORMAT: 1LP0148074

WorldCat.org lists:

BERTIE THE BOUNDER
Author:         [music:] Cuthbert Clarke; [words:] R C Tharp

But the only copy known copy of the sheet music is at Stichting Stadsbibliotheek, Haarlem, Netherlands!

Cuthbert Clarke also wrote THE GREEN EYE OF THE YELLOW GOD with J Milton Hayes.