Hayley's last attempt to teach Blake was in March 1805, the month in which Klopstock died. He translated parts of Klopstock's _Messiah_ aloud for Blake's benefit. Certain lines by Blake with big gaps have been preserved, which are hard for us to understand. The only thing we are quite sure about them is that they were written "after _too much_ Klopstock."
There was one great name that held Hayley and Blake alike at this time. We know that Blake had always admired Milton's superb gifts, while he disliked his theology. Blake's special friends had also been preoccupied with Milton. Fuseli, for example, not only disagreed with Dr Johnson's strictures on the poet, but he had been inspired by his ardent imagination to paint a series of pictures illustrating the poet's works, and these had been on public view at a Milton Gallery opened on May 20th, 1799, and reopened March 21st, 1800.
While Blake was with Hayley he naturally heard much of Milton from his latest biographer; and again their united interest in Cowper led them back to Milton, because of Cowper's cherished desire to edit Milton, with notes and translations.
In 1790, when Boydell's Shakespeare Gallery was a success, "bookseller" Johnson was fired with the idea of bringing out a magnificent Milton Gallery, "surpassing any work that had appeared in England." It was to contain Cowper's notes and translations and Fuseli's illustrations, for which the best engravers were to be found. The services of Sharpe and Bartolozzi were enlisted, and Blake was asked to engrave _Adam and Eve observed by Satan_. The project fell through owing to Cowper's mental indisposition; but when Hayley was engaged on the _Life of Cowper_ and Blake on its engravings, Cowper's _Milton_ came uppermost again in their minds, and it occurred to Hayley that it would be a good plan to bring out a fine edition of the delayed work, with engravings after designs by Romney, Flaxman, and Blake. The profits of the work were "to be appropriated to erect a monument to the memory of Cowper in St Paul's or Westminster Abbey." To this work was to be added Hayley's _Life of Milton_, so that the whole necessarily would spread out to three quarto volumes. The project was abandoned. Instead of the three volumes, one volume with Cowper's notes finally appeared in 1808, and instead of the proceeds going to a monument in St Paul's, they were given for the emolument of an orphan godson of the Sussex Bard.