“In this case it were enough to alledge for him to men of moderate minds, that what he there said was published before a book of poetry; and so ought rather to be esteemed as a problem of his fancy and invention, than as a real image of his judgement; but his defence in this matter may be laid on a surer foundation.  This is the true reason to be given of his delivering that opinion:  Upon his coming over he found the state of the royal party very desperate.  He perceived the strength of their enemies so united, that till it should begin to break within itself, all endeavours against it were like to prove unsuccessful.  On the other side he beheld their zeal for his Majesty’s cause to be still so active, that often hurried them into inevitable ruin.  He saw this with much grief; and tho’ he approved their constancy as much as any man living, yet he found their unreasonable shewing it, did only disable themselves, and give their adversaries great advantages of riches and strength by their defeats.  He therefore believed it would be a meritorious service to the King, if any man who was known to have followed his interest, could insinuate into the Usurper’s minds, that men of his principles, were now willing to be quiet, and could persuade the poor oppressed Royalists to conceal their affections for better occasions.  And as for his own particular, he was a close prisoner when he writ that against which the exception is made; so that he saw it was impos[s]ible for him to pursue the ends for which he came hither, if he did not make some kind of declaration of his peaceable intentions.  This was then his opinon; and the success of the thing seems to prove that it was not ill-grounded.  For certainly it was one of the greatest helps to the King’s affairs about the latter end of that tyranny, that many of his best friends dissembled their counsels, and acted the same designs under the disguises and names of other parties.  The prelate concludes this account with observing, that, that life must needs be very unblameable, which had been tried in business of the highest consequence, and practised in the hazardous secrets of courts and cabinets, and yet there can nothing disgraceful be produced against it, but only the error of one paragraph, and single metaphor.”

About the year 1662, his two Books of Plants were published, to which he added afterwards four more, and all these together, with his Latin poems, were printed in London, 1678; his Books on Plants was written during his residence in England, in the time of the usurpation, the better to distinguish his real intention, by the study of physic, to which he applied.