In the year following he was earnestly persuaded by Dr. Kilbie and others, to review the Logic Lectures which he had read some years past in his College; and, that done, to methodise and print them, for the ease and public good of posterity. But though he had an averseness to appear publicly in print; yet after many serious solicitations, and some second thoughts of his own, he laid aside his modesty, and promised he would; and he did so in that year of 1615. And the book proved as his friends seemed to prophesy, that is, of great and general use, whether we respect the Art or the Author. For Logic may be said to be an Art of right reasoning; an Art that undeceives men who take falsehood for truth; enables men to pass a true judgment, and detect those fallacies, which in some men's understandings usurp the place of right reason. And how great a master our Author was in this art, will quickly appear from that clearness of method, argument, and demonstration, which is so conspicuous in all his other writings. He, who had attained to so great a dexterity in the use of reason himself, was best qualified to prescribe rules and directions for the instructions of others. And I am the more satisfied of the excellency and usefulness of this, his first public undertaking, by hearing that most Tutors in both Universities teach Dr. Sanderson's Logic to their Pupils, as a foundation upon which they are to build their future studies in Philosophy. And, for a further confirmation of my belief, the Reader may note, that since his Book of Logic was first printed there has not been less than ten thousand sold: and that 'tis like to continue both to discover truth and to clear and confirm the reason of the unborn world.[5] [Sidenote: Senior Proctor] It will easily be believed that his former standing for a Proctor's place, and being disappointed, must prove much displeasing to a man of his great wisdom and modesty, and create in him an averseness to run a second hazard of his credit and content: and yet he was assured by Dr. Kilbie, and the Fellows of his own College, and most of those that had opposed him in the former Election, that his Book of Logic had purchased for him such a belief of his learning and prudence, and his behaviour at the former Election had got for him so great and so general a love, that all his former opposers repented what they had done; and therefore persuaded him to venture to stand a second time. And, upon these, and other like encouragements, he did again, but not without an inward unwillingness, yield up his own reason to their's, and promised to stand. And he did so; and was the tenth of April, 1616, chosen Senior Proctor for the year following; Mr. Charles Crooke[6] of Christ Church being then chosen the Junior.