The series of letters published as "Time and Tide by Weare and Tyne" were addressed[13] to Thomas Dixon, a working cork-cutter of Sunderland, whose portrait by Professor Legros is familiar to visitors at the South Kensington Museum. He was one of those thoughtful, self-educated working men in whom, as a class, Ruskin had been taking a deep interest for the past twelve years, an interest which had purchased him a practical insight into their various capacities and aims, and the right to speak without fear or favour. At this time there was an agitation for Parliamentary reform, and the better representation of the working classes; and it was on this topic that the letters were begun, though the writer went on to criticise the various social ideals then popular, and to propose his own. He had already done something of the sort in "Unto this Last"; but "Time and Tide" is much more complete, and the result of seven years' further thought and experience. His "Fors Clavigera" is a continuation of these letters, but written at a time when other work and ill health broke in upon his strength. "Time and Tide" is not only the statement of his social scheme as he saw it in his central period, but, written as these letters were--at a stroke, so to speak--condensed in exposition and simple in language, they deserve the most careful reading by the student of Ruskin. [Footnote 13: During February, March and April, 1867, and published in the _Manchester Examiner_ and _Leeds Mercury_.] Before this work was ended, Carlyle had come back from Mentone to Chelsea, and was begging his friend, in the warmest terms, to come and see him. Shortly afterward, a passage which Ruskin would not retract gave offence to Carlyle. But the difference was healed, and later years reveal the sage of Chelsea as kindly and affectionate as ever. This friendship between the two greatest writers of their age, between two men of vigorous individuality, outspoken opinions, and widely different tastes and sympathies, is a fine episode in the history of both. In May, Ruskin was invited to Cambridge to receive the honorary degree of LL.D., and to deliver the Rede Lecture. The _Cambridge Chronicle_ of May 24th, 1867, says: "The body of the Senate House was quite filled with M.A.'s and ladies, principally the latter, whilst there was a large attendance of undergraduates in the galleries, who gave the lecturer a most enthusiastic reception." A brief report of the lecture was printed in the newspaper; but it was not otherwise published, and the manuscript seems to have been mislaid for thirty years. I take the liberty of copying the opening sentences as a specimen of that Academical oratory which Mr. Ruskin then adopted, and used habitually in his earlier lectures at Oxford. The title of the discourse was "The Relation of National Ethics to National Arts."