Which Sherlock Holmes Story Should Guy Richie Make a Film of Next?

With four novels and over fifty short stories there are lots of Sherlock Holmes tales to choose from to make into films. A recent article from Alistair Duncan argues that the obvious choice is Black Peter. You can read Alistairs article here - Which Sherlock Holmes Stories Are Cying Out To Be Made? . You can vote for your own choice in the Sherlock Holmes Books Facebook Poll - at the time of writing 'A Study In Scarlet' has a healthy lead.