I'm so sorry to hear of the passing of Beau. I remember well his arrival in your home, and I knew he would be loved dearly for the rest of his days, however long that might be.
He knew he was loved and he knew you did all you could for him. He is now a young tabby again, carousing the RB and adding his opinions to how things are run up there.
{{{hugs}}} to you and Stuart at this difficult time.
RIP Beau, your grumpiness will be missed. :(
This may not be appropriate, but.......I can't help but wonder what wonderful senior kitty is going to be so lucky to fill the vacancy left by Beau..... ;)