With the coming of the summer the numbers of visitors increased at the Ark and the social life of London was restored. There was an explosion of debate as to how the new society should be built, what should be allowed and what should be forbidden. Pamphlets, sermons, diatribes, and journals poured off the little presses which had sprung up everywhere during the war years, new plays were written, new poems commissioned. There was a sense of excitement, of being at the very heart of change, a new world which no-one had ever experienced before. Kings had been killed before in England and elsewhere – but only on the battlefield, or in secret, and their thrones snatched by other claimants. Never before had the whole system of kingship been questioned and found so badly wanting that the people chose to destroy it and put no-one in its place.

Oliver Cromwell was to be known as Chairman of the Council of State, and there would never be another king of England. Even then the new state did not go far enough for many. There was no opening of the electorate: poor men still had no voice in the planning of the nation. There was no abolition of tithes, which many had fought for. There was no reform of the law, nor the ownership of land. The Houses of Parliament were still one House of Lords and a House of Commons packed with landed gentlemen, still serving their own needs before any other; so that the justice that John Lambert had hoped for so passionately was still far away.

But there was a sense of excitement and optimism as palpable as the warmer weather of May and June. There was a sense of changes coming, of hope, of a chance to make England into a country which could be prosperous for the many instead of the few. Families who had been estranged for years, siding with the opposing armies, were able to make friends again. Churches which had been emptied because of doctrinal arguments were now re-established with a new, freer, informal style of preaching. Men wanted to be done with ceremony, with artifice. Men wanted to speak freely to their God, and to speak freely to each other.

An informal association of philosophers, botanists, mathematicians, physicians and astronomers met regularly to debate, Dr Thomas Wharton among them, and John Tradescant too. John Lambert was in London from March and rarely missed a meeting, drawn by their discussion of science and botany. Many of them took to visiting the Ark that summer, to stroll around the garden, to sit by the little lake, to admire anything new and interesting in the rarities room and stay for dinner.