Even while in London, Nelson had collected the works of his favourite divines for his private use, and he now carried out more thoroughly the scheme, commenced in conjunction with Peter Brown, of publishing cheap editions of such books that they might be brought within the easy reach of thousands. Such cheap issues are now a common feature of the trade, but he was one of the first Edinburgh booksellers to introduce the new order of things. The series was very popular, but still it was by the publication of juvenile literature that Nelson’s great commercial success was achieved. The works of this special, and apparently inexhaustible class were distinguished by a good moral tendency, purity of diction, and elegance of production, and were laudably free from sectarian bias, and extreme opinion. It will, perhaps, suffice our present purpose to instance, among his many authors, R. M. Ballantyne, as a favourite with his boyish, and A. L. O. E. with her girlish, readers. One of Nelson’s periodicals attained a large circulation; this was the _Family Treasury_, edited by Dr. Andrew Cameron, and numbering among its contributors such writers as Dr. Guthrie, Dr. Vaughan, Dean Trench, and Brownlow North; in its columns the charming “Chronicles of the Schönberg Cotta Family” first appeared. Among the greatest of the more recent triumphs of the firm in the way of books for children, was the introduction of coloured illustrations upon a black background--a striking and emphatic method of throwing the coloured pictures into strong relief; the books illustrated upon this principle proved so successful that a host of imitators adopted the same method. The firm are also well known as extensive publishers of a greatly improved series of schoolbooks, of maps, embracing new and ingenious features, and of gift and prize books. Latterly, however, they have entered into a wider and more liberal field, and their current catalogue embraces works in most departments of literature. For the last five-and-twenty years of his life, Nelson was more or less of an invalid; though from 1843 to 1850 he enjoyed a kind of respite; but during this whole period his sons were associated with him in the business, and during the latter and greater portion of it, the management devolved entirely upon them. Thomas Nelson, the founder, died on March 23rd, 1861, and showed upon his death-bed the effects of that strong piety to which, since a child, he had accustomed his mind. When it was thought proper to announce to him that his end was near, he received the intelligence with the calmest equanimity:--“I thought so; my days are wholly in God’s hands. He doeth all things well. His will be done!” and then he took up his Testament again, saying, “Now I must finish my chapter.” He was buried in the Grange Cemetery, among many Scottish worthies, and lies side by side with Hugh Miller.