The two stayed in the Pub just long enough to finish their tea and leave the bill. As they walked back towards where The Doctor had parked the TARDIS, Sherlock spoke. "Whatever this thing was, it was trying to fit in. It didn't want to be noticed, and maybe that worked the first time, but probably not after the second, then it got sloppy. Curious… maybe it… no, no guessing. Only the clues. John has been theorizing far too much to me recently." Sherlock felt a small pang of guilt at leaving his Doctor, the one that mattered to him, back in the 21st century. He would have to find some way to apologize… maybe tidy up the flat some? Or that restaurant John liked on Third Street… he shook his head, not needing to get into those thoughts right now. "We need to work. Takes us back to your box and we can get this done. The sooner it's done, the sooner I can return to my time and my technology."
The Doctor watched Sherlock as they walked, his mind plagued with more and more memories of the Ponds and how he had let them down… guilt was consuming his heart, and he wanted nothing more now than to be alone. The harsh truth Sherlock had spat at him was repeated over and over again in his brain as they walked. "Yes, as soon as we're done I'll take you home… right." Sherlock watched The Doctor out of the corner of his eye, knowing he had probably done something to stop the happy attitude the other had had not too long ago. He ignored it though as they finally reached the TARDIS, going to open the door and step inside. He was slightly shocked when it didn't open for him as he was expecting.
"Your contraption is either locked, or doesn't want to let me in…" Sherlock stated and The Doctor blinked, looking up.
"Ah, sorry, here." He pulled out his key, turning it in the lock and unlocking the door, stepping inside before walking down one of the halls towards the library. They would have plenty of room there. As Sherlock closed the door behind him, he studied the other man, noticing every small miniscule detail about the other. But he kept silent, knowing, for once in his life, it was not his place to bring this up. Perhaps Mycroft had left this out of the report on The Doctor for a reason… or for once Sherlock's obnoxious older brother didn't know something. As he remembered reading, The Doctor was supposed to go off, after the Ponds had gone, and gotten himself depressed, hanging out in Victorian London all alone, and then found someone new who changed his perspective… but Sherlock hadn't been anywhere in the report, which lead him to believe Mycroft had left him out on purpose, or he had missed the fact that The Doctor was going to try and catch Jack The Ripper.
The two entered the library and The Doctor cleared a table for Sherlock to work on. "This should be helpful, I'll get some things together, but start piecing whatever you can together. If we find out what it is, we can find out how to stop it." The Doctor placed a large book down on the table before leaving Sherlock alone. Sherlock eyed the book for a moment before opening it and seeing a long listing of different aliens, what they looked like, what they could do, and where they were from, as well as encounter dates. Although he wanted to leaf through the book and find out just how many aliens there were out there in the universe, he pushed it aside. Jack The Ripper came first…
When The Doctor returned with a laptop in his hands, as well as a few more books tucked under his arm, he saw Sherlock leaning over the table, tacking a bit of string to a map, before running it across to a hook on the wall. The library was filled with string, running from the map to something else, it looked like a giant, red spiders web.
"Well," The Doctor started, placing his things on the table in a clear spot by the corner. "Looks like you've found the things you needed in the desk, anything else you need?" Sherlock ignored him for a moment before standing back.
"The first attack was not planned, it just happened. It wanted some sort of attachment, probably what it wanted from the others, but after the first, the bloodlust took over. There are several cases of eye witnesses whose descriptions don't match, so it must be a shape shifter of some sort. Probably a Zygon by the sound of things. Why it came to London from Scotland is beyond even my comprehension, but if it's not caught soon, it will kill again. It knows it's being followed and will probably soon know that we are after it. This area here," And Sherlock moved, pointing to a large red circle on the map. "Is where all the attacks happened. This area here," And he pointed to a smaller green circled area inside the large red one. "Is where it most likely is hiding. They always 'go home' as it were, so it shouldn't be too hard to find." He rubbed his hands together, looking over at the shocked expression of The Doctor. "Too fast? I can slow down for you if you'd prefer." The Doctor just shook his head.
"I didn't even have time to help and you've got it all figured out, haven't you? They don't call you London's greatest Detective for nothing… I suppose I should go out and find him, chances are there's no hope to save him from himself… and I can't return him to the other Zygons, they're only kill him…" The Doctor rubbed at his face, sighing heavily. Sherlock watched the other man for a few more moments before ducking under some string and walking over to him. He placed a hand on the tweed jacket in what might resemble comfort, if you could call it that from Sherlock Holmes. The Doctor looked up tiredly at the other man and sighed, giving a small smile.
"We catch it, than I think we both need a break, hm?" Sherlock looked tired as well as he moved his hand back, his emotions back under control as he straightened his suit jacket. The Doctor nodded and walked back out of the library towards the console room. This needed to end now.
