To John,
My black coat is for you. I have noticed your fondness of it despite accusing me of lifting up my collars to "act cool" in a sense. I doubt Mycroft would insist on taking it with him but if he does, show him this.
The rest of my belongings, I would assume, have been cleared into boxes and/or out of the flat. You may wish to move into my room for there's no need for extra stairs, will be easier on your leg.
Well then, it's time for you to move on and away from adrenaline filled days.
SH