Lines Inscribed Under Fergusson's Portrait

CURSE on ungrateful man, that can be pleased,
And yet can starve the author of the pleasure.
O thou, my elder brother in misfortune,
By far my elder brother in the Muses,
With tears I pity thy unhappy fate!
Why is the Bard unpitied by the world,
Yet has so keen a relish of its pleasures?