His career thus far in life, while generally successful, had also its portion of failures as well as triumphs. Two, of a marked character, occurred about the winter of 1851-2. Their ill success seemed rather to belong to the method pursued in presenting them, than to the capability of the man to make them meritorious. He had left Pittsburg for New York to make certain arrangements necessary for obtaining a _caveat_, preparatory to an application to the department at Washington for a patent for an invention, originally his own, for the ascending and descending of a locomotive on an inclined plane, without the aid of a stationary engine. Had he succeeded in his first plan, the second would have been satisfactory. In this piece of mechanism, he was wholly absorbed, and brought it to completion. At length he made it known to his friend, Dr. James McLune Smith, of New York. The doctor, being possessed of talents of high order, and devoted to scientific pursuits, looked favorably upon the plan, and at once proposed to take him to an extensive machine establishment in the city for consultation on the subject. At this establishment much curiosity, if not real interest, was manifested concerning it. But the reticence which characterizes him in matters in which concealment is necessary in no wise deserting him, and as he revealed but little to the proprietor, himself an inventor, the visit and interview were of no avail. Not disheartened by this, he applied to a distinguished patent attorney, who, on application for a _caveat_ after all the arrangements necessary, abandoned the effort as being unsatisfactory, leaving the inference to be deduced by Major Delany and his friend Dr. Smith that the only cause of neglect or refusal to entertain the proposition at Washington was, that the applicant must be a citizen of the United States. His own opinion was contrary to the statement of the attorney,--he believing the right to obtain copyrights or patents as not being restricted to the citizens alone, but in the reach of any person, whether American or foreign. He made a subsequent attempt to have it patented, but finally abandoned it. His attention and interest were drawn in another direction; for at this time adventure was at its height, and every vessel leaving the port of New York bore evidence of it. Many colored men, dissatisfied with their unrecognized condition, caught this spirit, and some embarked either for Greytown or San Juan del Norte,--this being the chief point of attraction, which was like a free city, or independent principality of Germany, but neither held obligations to the one, nor owed allegiance to the other. George Frederick, king of the Mosquitos, becoming dissatisfied with the intrusions and impositions practised by the former emigrants, Colonel Kearny, of Philadelphia, already on his way, if not at the point, said to Major Delany, “Every one seemed to breathe Central America.”