Bran knocks on the door of Heimerdinger's workshop outside of the Yordle Academy of Science & Progress.
"Hey Heimer! Are you in there?" He yells, "It's me, Bran! Corki wants to know about that scanning device you were working on for the search and rescue project. I have a few more letters to deliver so I don't have time to waste."
He waits expectantly for a reply, and, hearing none, slides a letter under the door. He leaves grumbling to himself, "That inventor... he's either forgotten about it or finished it. Where is he when I need him? Probably delivering a lecture on the properties of magic in metaphysical molecules...."