_Anno_ 1643, the church laid a very great work upon him, together with Mr. Calderwood and Mr. Henderson to form a draught of a directory for a public worship, as appears by an act of the general assembly. When the pestilence was raging at Glasgow in 1647, the masters and students, upon Mr. Dickson's motion, removed to Irvine. There it was that the learned Mr. Durham passed his trials, and was earnestly recommended by the professor to the presbytery and magistrates of Glasgow. A very strict friendship subsisted between those two great lights of the church, and, among other effects of their religious conversation, we have the sum of saving knowledge, which hath been so often printed with our confession of faith and catechisms. This, after several conversations upon the subject, and manner of handling it, so that it might be useful to vulgar capacities, was, by Messrs. Dickson and Durham, dictated to a reverend minister about the year 1650, and though never judicially approven by this church, yet it deserves to be much more read and practised than what it at present is. About this time he was transported from the profession of divinity at Glasgow, to the same work at Edinburgh. At which time he published his _prelectiones in confessionem fidei_ (now published in English), which he dictated in latin to his scholars. There he continued his laborious care of students in divinity, the growing hopes of a church; and either at Glasgow or at Edinburgh, the most part of the presbyterian ministers, at least in the west, south and east parts of Scotland, from 1640, were under his inspection; and from the forementioned book, we may perceive his care to educate them in the form of sound words, and to ground them in the excellent standards of doctrine agreed to by the once famous church of Scotland; and happy had their successors been, had they preserved and handed down to posterity the scriptural doctrines pure and entire, as they were delivered by our first reformers, to Mr. Dickson and his contemporaries, and from him and them handed down without corruption to their successors. All this time, _viz._ in 1650 and 1651, Mr. Dickson had a great share in the printed pamphlets upon the unhappy debates betwixt the resolutioners and the protestors, he was in his opinions for the public resolutioners: and most of the papers on that side were wrote by him, Mr. Bailey and Mr. Douglas; as those on the other side were wrote by Mr. James Guthrie, Mr. Patrick Gillespie, and a few others. Mr. Dickson continued at Edinburgh, discharging his trust with great diligence and faithfulness, until the melancholy turn by the restoration of prelacy upon the return of Charles II.; when, for refusing the oath of supremacy, he was with many other worthies, turned out; so that his heart was broken with this heavy change on the beautiful face of that once famed reformed church.