Maybe the letter was sent via carrier pigeon, seagull or songbird, but was returned to sender.
Whatever. Regina letting Robin read that letter, and her reflections of how she used to read the letter over and over for inspiration was a very touching scene. She really left herself be vulnerable when she told Robin she had always thoug the letter referred to her.
Regina’s realization that she would lose the battle against her sister was touching. Which made it all the more meaningful when she walked into the street and stood toe to toe with Zelena.
Also kinda liked Robin the pick-pocket.
I can’t wait for the conversation between Regina and Rumple….all this time, all these years, you knew I had a sister? And you never told me?