Sherlock keeps Harry’s letter in a special place
Because:
“Do you have any idea how smitten that kid is with you? It’s always ‘And then Sherlock and I did this! He’s so brilliant!’ or ‘Another case solved. Amazed by Sherlock as usual’. Seriously. You must either be one hell of a genius, or he’s head over heels. I wouldn’t be surprised if it was both. He could walk around wearing a cardboard sign and it wouldn’t be any more obvious.”
