by 
She wrote:
"When Bill first asked me out, he said, ‘I was thinking maybe we could go out two weeks from tonight.’ I told him he wasn’t spontaneous enough for me. So he called me an hour later to suggest we get together that night. He asked: ‘Is that spontaneous enough for you?’
"Bill, after two amazing decades together, your humor, drive, intelligence, curiosity, thoughtfulness, optimism – and, yes, your spontaneity– are as wonderful as ever. On land, at sea, and everywhere in between, I’m glad you’re by my side. Happy, birthday."