His Heresiography of 1645 was a precursor of the better-known Gangraena, and is a well-referenced account of contemporary sectarian Protestantism in England.
In them he commended to their notice his own Christianographie, the translation of the English prayer-book into Greek by Elias Petley, and William Laud's conference with John Fisher.
He was always a strong royalist, and in favour of the prayer-book; but he took the Covenant, and in 1645 he joined in a petition to Parliament for the establishment of presbyterianism, probably as a preferable alternative to independency.
[1] In his accounts of sectaries, he makes it a rule to give authorities; and they take a wide range, since he treats every deflection from Calvinism as heresy, and every approach to independency as faction.
He published: His nine letters to the patriarchs of Constantinople, Alexandria, Antioch, Jerusalem, Moscow, and of the Maronites, also to Prince Radziwil of Poland and John Tolnai of Transylvania, are in Harleian MS. 825.