I rather obviously agree with both Nicholas and Brutus, particularly bearing in mind Nicholas's invaluable research into Rupert's life, and Barrie's beautiful letter to Rupert's mother.
I've recently been taking a squint at Nico's letters to my researcher Sharon Goode, xeroxes of which Sharon sent me back in 2001. Her correspondence with Nico was almost as lengthy as mine, but was, on the whole, more chatty about peripherals than my tight focus on Barrie and the Davieses. This indeed was much at my request as Sharon and I only met up once every few weeks (she lived in Radlett, I in Chelsea) and had a hefty day job at ATV working on the Muppets which allowed her little spare time, so I didn't want to miss out on any gems that Sharon might not get around to passing on sooner rather than later.
That said, I had a quick leaf through some of Nico's earlier letters to Sharon, and found this, which adds a little extra light to Nico's 21 January 1976 letter to me (see database):
"I suppose my main reason in toying with suicide as Michael and Rupert’s way out was wrapped up in my confused thoughts as to what genius is or makes one: I used to think, perhaps still do – I don’t know! – that the really clever people are the ones more apt to choose to go … most of ‘my’ suicides, take Edward Marjoriebanks – another of Michael’s great friends – really something of a genius and tho’ the acccepted reason was a girl, I’m apt to think if he’d been nearer my standard of intellect he’d have lived on! Except that at bottom I’m a complete fatalist so far as dates of birth and death are concerned, i.e. I ‘know’ that Michael was doomed (or BLESSED) with the date of 19 May 1921. I cannot seriously consider latent or even actual homosexuality played any part qua suicide.
I so frequently have to say to you “I can’t remember”… I don’t know whether I’m more prone to this than most people. Certainly I must be the despair of any conscientious researcher. I would be pretty sure that over the years (not that I met him all that number of times, tho’ always affectionately) Roger Senhouse and I would have talked of Michael’s possible suicide. My guess, fairly solid, would be he’d react along the lines of “Ah, one will never know … I doubt it but… “ etc; all I’m certain of is that he NEVER criticised Rupert to me: and when one realises (as I always did) how devoted Roger was to Michael, he of all people would have had reason to comment adversely on Rupert had such adverse comment been deserved. Rupert, to me, is shining armour NOT Boothby sinister."