I found some sheet music on a carboot sale amongst stacks of magazines. The lady said they belonged to her grandfather but had no idea about the songs.
The songs were written by Harry Dacre an English songwriter born in 1860. He was famous for 'Daisy Bell' aka 'A Bicycle Made For Two' a song I remember singing with my nan when I was little. I have just discovered that the other song he was known for in the early 20's was 'I'll be your sweetheart'. I didn't know this until after I had made the brooch, spooky?