In his eleventh year he began that marvellous and rapid growth in stature for which he was so widely noted in the Pigeon creek settlement. "As he shot up," says Turnham, "he seemed to change in appearance and action. Although quick-witted and ready with an answer, he began to exhibit deep thoughtfulness, and was so often lost in studied reflection we could not help noticing the strange turn in his actions. He disclosed rare timidity and sensitiveness, especially in the presence of men and women, and although cheerful enough in the presence of the boys, he did not appear to seek our company as earnestly as before."* It was only the development we find in the history of every boy. Nature was a little abrupt in the case of Abraham Lincoln; she tossed him from the nimbleness of boyhood to the gravity of manhood in a single night. * D. Turnham, MS. letter. In the fall of 1818, the scantily settled region in the vicinity of Pigeon creek--where the Lincolns were then living--suffered a visitation of that dread disease common in the West in early days, and known in the vernacular of the frontier as "the milk-sick." It hovered like a spectre over the Pigeon creek settlement for over ten years, and its fatal visitation and inroads among the Lincolns, Hankses, and Sparrows finally drove that contingent into Illinois. To this day the medical profession has never agreed upon any definite cause for the malady, nor have they in all their scientific wrangling determined exactly what the disease itself is. A physician, who has in his practice met a number of cases, describes the symptoms to be "a whitish coat on the tongue, burning sensation of the stomach, severe vomiting, obstinate constipation of the bowels, coolness of the extremities, great restlessness and jactitation, pulse rather small, somewhat more frequent than natural, and slightly chorded. In the course of the disease the coat on the tongue becomes brownish and dark, the countenance dejected, and the prostration of the patient is great. A fatal termination may take place in sixty hours, or life may be prolonged for a period of fourteen days. These are the symptoms of the disease in an acute form. Sometimes it runs into the chronic form, or it may assume that form from the commencement, and after months or years the patient may finally die or recover only a partial degree of health." When the disease broke out in the Pigeon creek region it not only took off the people, but it made sad havoc among the cattle. One man testifies that he "lost four milch cows and eleven calves in one week." This, in addition to the risk of losing his own life, was enough, he declared, to ruin him, and prompted him to leave for "points further west."