OK STOP THE CLOCK! Whoever you're holding hostage you can let them go cause I GOT IT!

By the way, your clues were amazing. Confusing at first but once I'd worked out what they meant - very clever! You already knew how far I'd got before on Wiki...then your ACD clue threw me off slightly and I started thinking it was a cipher already used in one of the books...I knew the "sign of" part was a reference to "Sign Of Four" but I couldn't work out why...and then the "shape" part...last night I read a story out the Canon called the Red Circle, lol, to no avail!

And this morning you left another clue - "16". I started thinking how all the clues must fit together somehow and then I was thinking about shapes, and I suddenly remembered that one of the ciphers involved a square. I'd glanced at it the other night and tried it out with a few Sherlock related keywords but it hadn't worked so I'd crossed it off the list. So I had a look at the list of ciphers I'd made in my notebook and one of them was called the Four Square cipher and then all of a sudden everything made sense immediately!! Sign of Four...four squared is 16....and a square is a shape....Ingenious!

So now I knew what type of cipher had been used, all that remained was to decipher it...and actually that turned out to be the easiest part! I'd already tried it out with random keywords so I decided to just give it a go with the ones that were on Wikipedia and...it worked!

So the message is:

BW-XJ-FW-ZK-DI-RA-XS-KG-EH
IB-EL-IE-VE-IN-SH-ER-LO-CK = I Believe In Sherlock...!!

YAYYYYY! The annoying thing is, I'd already worked out ages ago that the message had the same number of letters as "I Believe In Sherlock", lol. I was so close but yet so far!

Anyway, that was amazing fun...and I've learnt loads about ciphers. 

Really well done! You guessed the phrase a while back but couldn't work out which cipher was being used. I was so tempted to say 'you've got it' but knew you hadn't really. You didn't need that many clues in the end. Clues are allowed, just as Jim gave Sherlock clues during The Great Game. Sherlock tells Moriarty that he hates riddles but he doesn't really.

Did I have you going there? Would you like another puzzle, cipher type message thingy?

Having just returned from an impromptu meal with the  'other half' I think it will have to be sometime tomorrow at least before it appears. Tell you what...it'll be worth it though!

Well this is embarrassing but I still don't get it. Do you think you could show the squares?

Do you have to fill the code into one of the squares or just use those squares?

Sorry I've been letting you struggle with the new one but I'm away from home at the moment so I need to refer to my notes when I get back so I can give you more help, if you want.

give us more clue~~~ hahaha

at first I thought it was a code for area (car license plate). and I was mistake.. LOL.

Well done Rosie! New clue for those who want / need later in the week. I will say that there are websites on ciphers out there folks.

Use the key from Wikipedia. It's the same one that she used.