Because of Mrs. Hudon's lectures and ramblings, Sherlock was convinced (more like forced) to take the bedroom in 221B. He argued that it would go to waste, as he was fine with sleeping on the couch. But with Sherlock's line of work, he would be needing the rest.
Under the unused bed in Sherlock's unused room, there were two boxes. One box, really just an old cookie tin, was filled with letters from a certain army doctor in Afghanistan. The second, an old tea tin, housed numerous unsent letters—letters that Sherlock never planned on sending
John Watson –
You have proved to be very interesting. I do hope to meet you someday.
(random scribbles)
(The paper is crumpled.)
John Watson—
Do you have family in London? Do they write as often as I do? I'm guessing not. You hinted that they were 'distant.'
Why do you write to me so often? Why not to them?
John,
Assuming I am correct, you are unwed. Though what I cannot deduce is if you have a lover waiting for you. Do you? Do they write to you as well? Am I sharing your free time with a lover of yours? I do apologise if that is the case.
John,
I may find you more than 'just' interesting.
(scribbled over and crumpled)
John,
When are you coming back? Will you agree to meet me when you do? Can we be friends?
(crossed out and crumpled)
John,
There is a bedroom upstairs if you're in need of a place to stay when you get back.
John,
I lo—
(crossed out with the words, "STUPID. STUPID. STUPID," at the bottom)