I don't have any Sherlock related ones. You could try the original riddle by Einstein: http://www.woodward.cl/engeinsteinsriddle.htm or you could try to find something on the internet.
- - - – – – - - - - - - - - - – - - – - - – – – – - – - – - – - – - -
Up, down, flying around, looping the loop and defying the ground.
They're all frightfully keen, those magnificent men in their flying machines!