In 1673 the poems published in 1645, both English and Latin, appeared in a second edition, disclosing _novas frondes_ in one or two of Milton's earliest unprinted poems, and such of the sonnets as political considerations did not exclude; and _non sua poma_ in the Tractate of Education, curiously grafted on at the end.

An even more important publication was the second edition of "Paradise Lost" (1674) with the original ten books for the first time divided into twelve as we now have them.

Nor did this exhaust the list of Milton's literary undertakings.

He was desirous of giving to the world his correspondence when Latin Secretary, and the "Treatise on Christian Doctrine" which had employed so much of his thoughts at various periods of his life.

The Government, though allowing the publication of his familiar Latin correspondence (1674), would not tolerate the letters he had written as secretary to the Commonwealth, and the "Treatise on Christian Doctrine" was still less likely to propitiate the licenser.