User blog comment:Vremyanova/Speculated Future Servant, Short Introduction, and Their Possible Class/@comment-27247829-20160303121000

Didn't Sherlock Holmes uses Bartitsu? If combined with the disguise part, he could be a plausible candidate for Assassin class with Bartitsu as his fighting style. It won't be strange, considering that we knew a certain Servant uses Pankration, though not as his main form of offense. If the 'science' part is flanderized along with his history of cocaine usage, he could be a Caster with low-rank Item Creation.