Dickens to give a sample of a poet that would appeal to Gradgrind mentions Cocker. I'll bet Dickens had to do some searching to disinter Cocker:
EDWARD COCKER
English engraver, teacher and arithmetician
(1631 - 1675)

When Honor's sun declines, and Wealth takes wings,
Then Learning shines, the best of precious things.
- Urania [Learning]