‘The Everlasting Mercy’ is a long narrative poem by-

John Masefield(1878-1967):
-He is a British poet.
- He is Best known for his poems of the sea, ‘Salt-Water Ballads’ (1902, including “Sea Fever” and “Cargoes”), and for his long narrative poems, such as ‘The Everlasting Mercy’ (1911).
His other notable works: Dauber, Reynard the Fox.

Source: Encyclopaedia Britannica