Definition of "unhoped"

The Prince of peace would like himself confer / A gift unhoped, without the price of war

1660, [John] Dryden, Astraea Redux

With these words he gave him a letter directed, as he had said, but not sealed, which Horatio, after he had manifested the sense he had of so unhoped an obligation, reminded him of.

1744, Eliza Fowler Haywood, The Fortunate Foundlings‎

Men on cycles, lean-faced, unkempt, scorched along every country lane, shouting of unhoped deliverance, shouting to gaunt, staring figures of despair.

1898, H.G. Wells, The War of the Worlds, London: William Heinemann, page 289