This preferment being not thought adequate to the deserts or abilities of Mr. Cheynel, it was, therefore, desired, by the committee of parliament, that the visiters would recommend him to the lectureship of divinity, founded by the lady Margaret.  To recommend him, and to choose, was, at that time, the same; and he had now the pleasure of propagating his darling doctrine of predestination, without interruption, and without danger.

Being thus flushed with power and success, there is little reason for doubting that he gave way to his natural vehemence, and indulged himself in the utmost excesses of raging zeal, by which he was, indeed, so much distinguished, that, in a satire mentioned by Wood, he is dignified by the title of archvisiter; an appellation which he seems to have been industrious to deserve by severity and inflexibility; for, not contented with the commission which he and his colleagues had already received, he procured six or seven of the members of parliament to meet privately in Mr. Rouse’s lodgings, and assume the style and authority of a committee, and from them obtained a more extensive and tyrannical power, by which the visitors were enabled to force the solemn league and covenant, and the negative oath upon all the members of the university, and to prosecute those for a contempt who did not appear to a citation, at whatever distance they might be, and whatever reasons they might assign for their absence.

By this method he easily drove great numbers from the university, whose places he supplied with men of his own opinion, whom he was very industrious to draw from other parts, with promises of making a liberal provision for them out of the spoils of hereticks and malignants.

Having, in time, almost extirpated those opinions which he found so prevalent at his arrival, or, at least, obliged those, who would not recant, to an appearance of conformity, he was at leisure for employments which deserve to be recorded with greater commendation.  About this time, many socinian writers began to publish their notions with great boldness, which the presbyterians, considering as heretical and impious, thought it necessary to confute; and, therefore, Cheynel, who had now obtained his doctor’s degree, was desired, in 1649, to write a vindication of the doctrine of the Trinity, which he performed, and published the next year.

He drew up, likewise, a confutation of some socinian tenets advanced by John Fry, a man who spent great part of his life in ranging from one religion to another, and who sat as one of the judges on the king, but was expelled afterwards from the house of commons, and disabled from sitting in parliament.  Dr. Cheynel is said to have shown himself evidently superiour to him in the controversy, and was answered by him only with an opprobrious book against the presbyterian clergy.