Summary: In Greek mythology, Argus the guardian of Io is sometimes said to have a hundred eyes. In the wizarding world, Argus the caretaker of Hogwarts has only two eyes, but he sees a great deal all the same.
Disclaimer: The world of HP and its characters belongs to Rowling.
Word count: ~11,800
Author Notes: Such a great prompt, chaos_rose. I was sorely tempted by the notion of Severus and Minerva as Holmes and Watson, but that was before Argus shoved his oar in and demanded to be part of it all. I thought about transfiguring him into Mrs Hudson, but he didn't like the idea. So here is the story he wanted told. If the kink level is too low, please blame him.
If this story is worth reading, it's because I have a BBE (best beta ever). Thank you! And thank you, mods.