If you've caught this update early, there are only a few hours left on the Kickstarter! Get in on the bonus goods while you can!
Aaaand here are the references you need for Buer's mission! Mandrakes also come in yellow, green, pink, and blue varieties on Screaming Island. The Topsider Jacks running along Screaming Island can all communicate telepathically with Buer, too, but the Topsider Jacks can't speak like Buer can.—glitchedpuppet