A Weekend in Capri

I just started this game and, guess what, I'm stuck already. I think I'm getting to old -or maybe not. Anyway I'm supposed to find a key behind a gate of the greengrocer. Where is it?

Midge-you have to find out where his house is. He isn't referring to his shop...Many things in this game depend on another errand you have to run. You might want to play Newspaper boy first....
Kate