I am currently starting a illustration project for university and one of my major characters is Sherlock Holmes.
I was currently wondering in all versions of Sherlock, what would he use to look under a locked door of a well lit room, that he could not open. He can not remove the door, unlock or open the door, or look through any other windows, cracks or holes. Simply what kind of equipment would he use to look under the door and into a room?
This can be from the original literature or any of the alternative versions.
Thank you