As part of an ongoing project on my Twitter feed, I'm delivering stories from the Sherlock Holmes canon in tiny installments of 140 characters or less. I recently finished up "The Engineer's Thumb," which is one of only two cases that Dr. Watson's was able to bring to Sherlock Holmes's attention (the other being the unpublished case of Colonel Warburton's madness).
The current story is "The Bruce-Partington Plans," which features an appearance by Mycroft Holmes and is one of only two stories from the Canon to feature the elder Holmes brother (he is also mentioned indirectly in two others). In this story, Sherlock Holmes somewhat reveals the true nature of his brother's work for and as the British Government.
Check out my Twitter feed for a daily installment, although I am usually inspired to post more than once a day. And don't forget you can read through the original canon online.