Buckingham, however, did not accompany his royal master in this his last progress; but, although his separations from the King and Court were more frequent than formerly, many letters from James to the Favourite, preserved among the Harleian manuscripts, sufficiently attest the unchanged character of the King’s devotion, not only to his favourite, but to his whole family. CHAPTER III. DECLINE OF THE KING’S HEALTH--CASE OF LORD MIDDLESEX--PROCEEDINGS IN BOTH HOUSES--SIR EDWARD COKE’S EXAGGERATION--BUCKINGHAM’S PARTICIPATION IN THE AFFAIR--MIDDLESEX STEALS AWAY TO THEOBALD’S, AND IS FOLLOWED BY CHARLES--FOUND GUILTY--CONFINED--BUCKINGHAM’S DANGEROUS ILLNESS--ARTHUR BRETT--DEATH OF THE KING--ASCRIBED TO BUCKINGHAM. =CHAPTER III.= The health of James the First had long been declining, and the vexations which troubled his last years contributed, it has been supposed, greatly to its decline. A mortal internal disease, however, aggravated by an attack of tertian ague, left, in the spring of the year 1625, little hope of his recovery. When told, during the access of this disorder, the proverb, that “ague in the spring was health to a king,” he remarked that the saying was meant to apply to a young king. The King was, in truth, only fifty-eight years of age, but, independent of his originally feeble constitution, he, like other men in those times, was old of his age. It has been our blessing, under the improvements of science, and in the habits of the nineteenth century, to retain, if not youth, many of its greatest advantages, to a period of life far more advanced than that in which James was styled the “old King,” a term to which he gave his mournful assent. Amongst the numerous causes which, with the Spanish treaty, vexed the royal invalid, the case of the Lord Treasurer Middlesex was prominent. In this minister James had rested unbounded confidence, which nothing but the clearest evidence of the Lord Treasurer’s corruption could undermine.