Use "greybeard" in a sentence

1. David Greybeard was the first chimpanzee who approached and

2. 'Little cousin,' he said, 'in me thou beholdest a dreamer of dreams, an unpractical greybeard, a venerable sheep's-head

3. For his o'erarching and last lesson the greybeard sufi,

4. 'Then thou art the spokesman, old greybeard?