Some men overcome obstacles and attain their ends by sheer persistency of will, others by tact and persuasiveness, while there is a third class, before whom the barred doors open as they are successively approached, through what are called either fortunate accidents or Providential interventions, but are seen, on closer inspection, to have been the direct and natural effects of the force unconsciously exerted by an harmonious combination of qualities. Agassiz's career was full of such instances. The insistent desire of his parents, while stinting themselves to secure his education, that he should adopt a bread-winning profession, yielded, not to any urgent appeals or dogged display of resolution, but to the proof given by his labors that he was choosing more wisely for himself. Cuvier, without any request or expectation, resigned to the neophyte who, after following in his footsteps, was outstripping him in certain lines, drawings and notes prepared for his own use. Humboldt, at a critical moment, saved him from the necessity for abandoning his projects by an unsolicited loan, supplemented by many further acts of assistance of a different kind. In England every possible facility and aid was afforded to him as well by private individuals as by public institutions. In America, men like Mr. Nathaniel Thayer and Mr. John Anderson needed only in some chance way to become acquainted with his plans to be ready to provide the means for carrying them out. It was the same on all occasions. The United States government, the Coast Survey, the legislature of Massachusetts, private individuals throughout the country, showed a rare willingness, and even eagerness, to forward his views. The man and the object were identified in people's minds, and, as in all such cases, a feeling was roused and an impulse generated which could have sprung from no other source.