That actually reminds me a bit of Sherlock's relationship with John. "Not good?" "Bit not good."

Hehe! I suppose Siger basically married his Watson.

I can also imagine once their father died, Trevelyan might have felt like the time for second guessing was over. One just had to keep calm and carry on.

Yeah, I think the Holmes brothers responses to the sudden death were 'I will control everything so nothing bad happens again' (Mycroft), 'Caring about people makes you feel Bad when they die, I will not care' (Sherlock), and 'Maybe if I'm quiet and do everything right no one else will die' (Trevelyan).

I also wonder if disappointing one's older brother is not so upsetting as disappointing one's father, so some of the pressure was off him.

Or Mycroft was totally an awesome oldest brother.

Yeah, even Mycroft isn't buying that.