Needing some one, however, to assist him in his practice, which was then considerable, he invited Lincoln into partnership. He had, as we have seen, formed a favorable opinion of the young Kentuckian the first time they had met. In his subsequent acquaintance with him he had come to recognize and respect his abilities, his unpretending common sense, and his innate integrity. The partnership continued about four years, but the benefit Lincoln derived from it lasted all his life. The example of Judge Logan's thrift, order, and severity of morals; his straightforward devotion to his profession; his close and careful study of his cases, together with the larger and more important range of practice to which Lincoln was introduced by this new association, confirmed all those salutary tendencies by which he had been led into the profession, and corrected those less desirable ones which he shared with most of the lawyers about him. He began for the first time to study his cases with energy and patience; to resist the tendency, almost universal at that day, to supply with florid rhetoric the attorney's deficiency in law; in short, to educate, discipline, and train the enormous faculty, hitherto latent in him, for close and severe intellectual labor. Logan, who had expected that Lincoln's chief value to him would be as a talking advocate before juries, was surprised and pleased to find his new partner rapidly becoming a lawyer. "He would study out his case and make about as much of it as anybody," said Logan, many years afterwards. "His ambition as a lawyer increased; he grew constantly. By close study of each case, as it came up, he got to be quite a formidable lawyer." The character of the man is in these words. He had vast concerns intrusted to him in the course of his life, and disposed of them one at a time as they were presented. At the end of four years the partnership was dissolved. Judge Logan took his son David--afterwards a well-known politician and lawyer of Oregon--into his office, and Lincoln opened one of his own, into which he soon invited a young, bright, and enthusiastic man named William Henry Herndon, who remained his partner as long as Lincoln lived. The old partners continued close and intimate friends. They practiced at the same bar for twenty years, often as associates, and often as adversaries, but always with relations of mutual confidence and regard. They had the unusual honor, while they were still comparatively young men, of seeing their names indissolubly associated in the map of their State as a memorial to future ages of their friendship and their fame, in the county of Logan, of which the city of Lincoln is the county-seat.