Our Miss Gibbs, I find from wiki-ing that title, was not the musical in which this song appeared. Grossmith Jnr was indeed the player of a leading part in its original 1909 production at the Gaiety, but he is not listed as one of the writers; nor does the song appear in the List of Musical Numbers.

So does anyone know in which show it did in fact originate? - Probably a Gaiety musical as that was the theatre with which Grossmith Jnr was most associated.

~M~