The day of the S note, John had accompanied Sherlock to the Yard. Since the detective was working on cold cases, and John was healing nicely, they had decided to venture out together. Actually, Sherlock was worried that if he left John to his own devices, he would end up hurt again, and John as aware as he was of Sherlock, knew that Sherlock was worried about that, so despite the slight stiffness he was still feeling, he decided to venture out with Sherlock.
Hours passed quickly, and Sherlock solved five cases. Normally, he would have done twice as many, but they were having fun by playing a game. They both came up with ridiculous, yet plausible ways, that the crime might have been committed and then whoever had the more outlandish solution won that round.
It got more fun, when, of all people, Lestrade, joined them in the game. By that time the game had evolved to a collaborative one where each of them contributed to the most ridiculous, yet plausible, story that they could invent.
Suddenly, an easy case of neighbor intrusion, leading to murder, well simple for Sherlock at least, became a case were the mafia hired dogs and cats and trained them in the art of espionage, and that was the most realistic that they had come up with.
By the time Sherlock and John had arrived back home, It was midnight. John had gone to bed and Sherlock had entertained himself with an experiment.
When the sun was up and John hadn't come into the kitchen, Sherlock went to check on him. He found John sleep in bed, lightly holding onto a note. Sherlock debated for a moment, if he should try and get the note, then he finally decided that, if John didn't want him to have it yet, he would have waited to write it or at least hid it, until he was ready to give it to him. Gently, Sherlock pulled the note from the hand that gripped it, the fact that didn't grip it tighter or wake up, because of that told Sherlock that he had been correct in his thought process.
T- is for trust no more need be said