Authors:

When I came on board, it was halfway through his [Frank Sinatra] 72nd year, and when he did his last show he was gaining on 80. He knew it, the audience knew it, and there was never any attempt to conceal such a thing. His vision wasn't what it had once been. His hearing wasn't. His memory was fading. He knew these things. He was very much in need of help, and I was so happy to be able, in a small way, to render that help.

Source: www.dailypress.com
When I came on board, it was halfway through his [Frank Sinatra] 72nd year, and when he did his last show he was gaining on 80. He knew it, the audience knew it, and there was never any attempt to conceal such a thing.