DEATH OF A NOTED COLORED MAN. –Stephen Smith, for many years the aged leader of the colored race inn Philadelphia, died on Friday last.  His life was divided into a youth of slavery, a manhood of freedom bought by his own labor, and an old age of wealth and honor.  He voted for General Jackson as a Democrat in 1834; lost his vote by the act inserting the word “white” into the State Constitution of Pennsylvania in 1838, and got it back under the constitutional amendments of 1869.  He has made, it is stated, splendid benefactions to the aged poor.