Sherlock opened the door to St Bart's rooftop, turning up his coat collar against the cold 1 AM wind. There wasn't anyone in sight, and a quick sneak around the place revealed no one hiding. Had he gotten the place wrong? Sherlock looked around. No one on any other rooftop, including the cafe where the message had come from. Was he late? No, Sherlock had directed the cabbie to the quickest route, and there had been very little traffic. Early? Perhaps… or maybe not. Maybe the game was intended to last a little while. Sherlock smiled; Moriarty was always good at knowing when Sherlock was bored, and while it should worry him, Sherlock was glad for the distraction.

"So if this was a game, there should be clues, right?" thought Sherlock. "Where would our friendly bomber leave me clues?" He started on the ground, tracing the steps he thought fit the Consulting Criminal. There was only one door, and there was no way Moriarty would climb the building. So through the door, to the edge, looking over the street and the city, then back… to where? Not the door. Not the air conditioning unit. Not to any of the corners or the other sides of the roof. Sherlock peered over the edge of the roof and there, posted upside-down, was a bright yellow sticky note with a smiley face. "Oh" Sherlock surprised himself by saying it out loud. And he ran downstairs and hailed a cab back to his flat.

—

Half an hour later Sherlock burst into his living room, ready to kick the meddling Moriarty out. But again, no one was there. Not waiting, not hiding, nothing was missing or moved, the dust line was unbroken. Sherlock strode over to the bullet-riddled smiley he'd painted on the wall almost a year and a half ago. Something was lodged in one of the bullet holes… no, something was lodged in all of them. After digging each prize out of the wall with tweezers, Sherlock found himself holding a pill of poison from A Study in Pink, a tiny origami black lotus, an equally tiny cube of C4 (unactivated, no wires), a chunk of red lipstick, and a pile of breadcrumbs.

One memento from each of four cases Sherlock had solved, and a trail of breadcrumbs to link them all - Moriarty. Just another reminder of all the strings the Consulting Criminal had pulled so far, and Sherlock was quite sure that wasn't even a fraction of the number he actually held. But now where was he supposed to go? If the breadcrumbs hadn't been included he would have gone to each of the sites where the events took place, but that didn't seem to be the message. There were too many places, too many possibilities, and Sherlock didn't think Moriarty would be patient enough to wait for him to explore each location. "Still, better send a message out to the Homeless Network just to be sure," he thought, before another thought occurred to him: the website. John's website! It started with A Study in Pink, and all the other cases had stemmed from there. Sherlock almost tripped on the coffee table in his haste to get to the computer, but it was worth the bruised shin when he found a video posted on John's blog - a video of Moriarty breaking into the flat! It must have been filmed while Sherlock was on the roof of St Bart's! The text below the video said, "see you soon, boys! xxxx".

Four pips. Janus Cars had been the location the last time Moriarty had sent four pips, could that be where he was supposed to go? But the Janus Cars case had three locations in itself: the river where the car was found, the actual building where the business had operated, and the warehouse where Sherlock had explained the case to Lestrade… Sherlock looked over the prizes from the wall again, and took them over to his microscope. Nothing was hidden inside the pill capsule, and unfolding the lotus didn't yield any results. However, each side of the C4 cube was etched with a letter: CEFFIO. After making sure the lipstick didn't have any additional messages (it didn't), Sherlock left the flat for the former site of Janus Cars' office, making sure his homeless friends got out of harm's way as he rode in the cab.

He'd barely paid the cabbie before he was knocked out by a blow to the back of the head.