Whilst at Warrington he also gave lectures on the “Theory of Language,” on the “Laws and Constitutions of England,” and on “Oratory and Criticism”—all of which were subsequently published, and which may still be read with profit, despite Lord Brougham’s sneering allusion to the adventurous tutor afflicted with an incurable stutter who, having never heard any speaking save in the pulpits of meeting-houses, promulgated rules of eloquence and of jurisprudence to the senators and lawyers of his country. The adventurous tutor with the incurable stutter even taught Elocution, also Logic and Hebrew for a time, and one year he gave a course of lectures on Anatomy. Whilst at Warrington he published a _Chart of Biography_, exhibiting by lines and spaces the succession of the eminent men in every age and of every profession, with the relative length of their lives, and in such manner that at any given epoch it could be seen not only who flourished in it, but how all their ages stood with respect to one another, who were a man’s contemporaries, how far any of them was before him, or how far after him, in the order of their births or deaths. The _Chart of Biography_ procured for its compiler the degree of Doctor of Laws of the University of Edinburgh. It has been said of Priestley that he was not a man who made friends. If it is meant by this that he was essentially a self-centred recluse, who sought his relaxation in change of occupation, or only within his own family circle, the statement gives a wholly imperfect idea of the man and is very wide of the truth. In reality he was one of the most gregarious and most easily approachable of individuals, a man of strong, active human sympathies and of much social charm. There is abundant evidence of this in the testimony of his contemporaries; it is illustrated by numberless anecdotes, and is reflected in almost every letter of his correspondence. It was, doubtless, under the impulse of the social instincts of his nature that, whilst at Warrington, he was led to begin the practice of spending one month in every year in London. This, remarks his son, was of great use to him. He saw and heard a great deal. A new turn was frequently given to his ideas. New and useful acquaintances were formed, and old ones confirmed. London then, as now, was the centre of the intellectual life of the kingdom and the Royal Society the seat of its scientific activity. To a man of Priestley’s versatility and eagerness, whose curiosity ranged practically over every department of human knowledge, these annual visits were a sort of intellectual tonic and gave a powerful stimulus to his activity. On the first of them he made the acquaintance of men who, in their several capacities, proved to be true and valuable friends, notably, Dr Richard Price, Mr Canton, and Dr Benjamin Franklin.