His apprenticeship over, John Kennedy commenced business[5] in a small way in Manchester in 1791, in conjunction with two other workmen, Sandford and MacConnel. Their business was machine-making and mule-spinning, Kennedy taking the direction of the machine department. The firm at first put up their mules for spinning in any convenient garrets they could hire at a low rental. After some time, they took part of a small factory in Canal Street, and carried on their business on a larger scale. Kennedy and MacConnel afterwards occupied a little factory in the same street,--since removed to give place to Fairbairn's large machine works. The progress of the firm was steady and even rapid, and they went on building mills and extending their business--Mr. Kennedy, as he advanced in life, gathering honour, wealth, and troops of friends. Notwithstanding the defects of his early education, he was one of the few men of his class who became distinguished for his literary labours in connexion principally with the cotton trade. Towards the close of his life, he prepared several papers of great interest for the Literary and Philosophical Society of Manchester, which are to be found printed in their Proceedings; one of these, on the Invention of the Mule by Samuel Crompton, was for a long time the only record which the public possessed of the merits and claims of that distinguished inventor. His knowledge of the history of the cotton manufacture in its various stages, and of mechanical inventions generally, was most extensive and accurate. Among his friends he numbered James Watt, who placed his son in his establishment for the purpose of acquiring knowledge and experience of his profession. At a much later period he numbered George Stephenson among his friends, having been one of the first directors of the Liverpool and Manchester Railway, and one of the three judges (selected because of his sound judgment and proved impartiality, as well as his knowledge of mechanical engineering) to adjudicate on the celebrated competition of Locomotives at Rainhill. By these successive steps did this poor Scotch boy become one of the leading men of Manchester, closing his long and useful life in 1855 at an advanced age, his mental faculties remaining clear and unclouded to the last. His departure from life was happy and tranquil--so easy that it was for a time doubtful whether he was dead or asleep.