In 1837, Jonathan, being of the age of nineteen years, determined to go out into the world to seek adventure and fortune. He accordingly set out for that great region to which attention was then turned--the Western country. Having but slight means to pay the expenses of traveling, he walked nearly the whole of the journey. At Chillicothe, in Ohio, his wanderings were for a time ended. The exposure to which he had been subjected, caused a very severe attack of pleurisy. It happened most fortunately for him that a kind farmer, Mr. John A. Harris, pitied the boy; whose sprightliness, social accomplishments, and good conduct, had made a favorable impression. He was taken into Mr. Harris' family, and assiduously nursed during an indisposition which lasted more than two months. This circumstance appeased his roving disposition for a time, and he remained upon the farm of his good friend, Mr. Harris, for two years, making himself practically acquainted with the life and toils of an agriculturist. In 1839, he concluded to return to Philadelphia, where he remained for a time with his family. But the spirit of adventure returned. He connected himself with a theatrical company, and traveling through Delaware, Maryland, and Virginia, was finally checked in his career at Pittsburg, where he undertook the management of a hotel. This business not being congenial, he soon sold out the establishment, and returned to Philadelphia. He shortly afterwards started away on a theatrical tour, which extended through most of the Southern States, and into Texas. In this tour, Mr. Kelly went through a great variety of adventures, saw many strange scenes, and obtained a fund of amusing experience, which afterward served him to great advantage in his literary sketches. After having thoroughly exhausted his roving desires, he returned to Philadelphia, where, indeed, upon his previous visit, he had become subject to a new attraction, the most powerful which could be found to restrain his wandering impulses. He had become acquainted with a worthy young lady, to whom, upon his return, and in the year 1842, he was married.