His own anti-Parliament pamphlet Pro-quiritatio was suppressed in 1642, and Royston began publishing the work of high-Anglicans like Jeremy Taylor and Henry Hammond.
[2] Royston was charged by John Wright, parliamentary printer, on 31 July 1645, as being the "constant factor for all scandalous books and papers against the proceedings of parliament".
[4] In 1646 he published Francis Quarles's Judgment and Mercie for afflicted Soules, and wrote and signed the dedication addressed to Charles I.
In 1648 appeared, "printed for R. Royston in Ivie Lane", the first edition of Είκών Βασιλική, of which about fifty impressions were issued in six months.
[5] On 23 May 1649 Royston had entered to him in the register of the Company of Stationers "The Papers which passed at Newcastle betwixt his sacred Majesty and Mr. Henderson concerning the change of church government".