April 18, 1828 finds Sir Walter Scott meeting several people over several different meals during the course of the day. The day started with Scottish playwright Joanna Bailey. Baillie apparently enjoyed hearing ghost stories as a youngster, which may explain how she came to prepare a play on witchcraft. It wasn't until 1830 that Scott began his own "Letters on Demonology and Witchcraft".
'April 18.—Breakfasted with Joanna Baillie, and found that gifted person extremely well, and in the display of all her native knowledge of character and benevolence. She looks more aged, however. I would give as much to have a capital picture of her as for any portrait in the world. She gave me a manuscript play to read upon Witchcraft...'