The fourth time John found the key, it was waiting for him on the kitchen table next to a steaming cup of tea the very next morning. The tea was made correctly, milk and all, which was a first for Sherlock. It was accompanied by a note:

J -

Made tea. Remembered milk. Triple homicide London Eye, no one else in compartment. Lestrade thinks murder-suicide but no knife. Come when awake.

Left you a key.

- S

John relaxed into the chair and sipped his tea. Sherlock could have banged on his door and woken him up, he supposed, but it was rather nice that he hadn't. John hadn't expected to be in possession of the key again so soon, honestly, but now that he was, he might as well make the most of it.

He didn't get to the crime scene until nearly an hour later, but that was okay. Sherlock was perfectly capable of dealing just fine without him for a while, and John had been busy with more important things. He now had a whole list of ideas for what he wanted Sherlock to do in exchange for that key . . .