What a great shame that you were not there to say goodbye, but everything happened as it should for Harvey, and that is the important thing - the right decision was made, and he had someone who loved him there at the end.
Harvey has a great life and it sounds like a loving, caring home. I'm glad he was with somebody. I have no doubt that my Sasha who was also the elder statesman of the family, has greeted him on the RB where he can look over all the others. It doesn't make it any easier, and I so so very sorry for your loss, but the fact that he was with you for so long is a testament to your care.
I already posted in the other thread about Harvey but please accept my condolences. It's so hard to lose a pet and even harder to have to make the decissions for a sick pet. I had to for Jake as well so I understand.