Dean's lack of proficiency at mountain climbing left him to make do instead of utilizing a more effective and safer method of descent.
Its main object is to perfect the proficiency of players in certain departments of bowls proper.
There again his proficiency, especially in physical science, was marked, and he was one of the young Russians chosen to complete their education in foreign countries.
He still continued his yearly experimental contributions to the North American Review, elaborating them with a view as much to ultimate historical proficiency as to immediate literary effect, the essays on Scottish Song (1826), Novel-Writing (1827), Moliere (1828), and Irving's Granada (1829)) belonging to this preparatory period.
Apart from decided signs of proficiency in mathematics, he showed no special ability.