Ted, I keep remembering my maternal grandfather. When he was about 85, my mother and aunt went down home to "check" on he oand my grandmother, and caught him about 90' up in an old oak tree, topping it out with a hand saw because it had gotten tall enough to block off part of the sun from his 4acre garden. He did this while taking a break from building a new fireplace for his neighbor, all masonry, all by him, two story house for the chimney. There was an old Ford tractor in the barn he'd just torn down to rebuild the engine (why I don't know - he plowed the garden with his mule). Mother and aunt crawled all over him about "overdoing" it, and made him promise to cut back. He only lasted 5months after that...

Never quit working...