This is the song Kitty sings Nan when she gives her the rose, and later Nan sings to Florence.
Oh, I can go out on the town to all the grand hotels,
going it large till midnight with all the London swells
but it ain’t any good at all.
I cant help remembering, can’t help remembering
The girl I kissed behind the garden wall
Oh Rosie, do you remember,
The promises we made only last September?
Why did I have to go away?
We said goodbye with a tear and sigh,
And whispered all the pretty things that sweethearts say.
You promised you’d never forget me.
I promised I’d always be true.
Oh Rosie,
(Dear Rosie…)
There’s a rose in my heart for you.