OUR heroes grow upon us all our lives long. At school we read of Washington at Valley Forge, of Lincoln at Gettysburg.We soon wish to know how they lived as boys, who their fathers and mothers and playmates were. We pass to manhood and our sense of debt to these great men deepens, as we assume our duties in upholding the institutions they founded and preserved. We take up the autobiography which fully recount how Washington and Lincoln came to their supreme opportunities, and grasped them with strong hands. As the years follow one another, our interest widens to embrace the life-stories not only of leaders in government, but also the chieftains of art, science and literature. To the lives of Hamilton and Jefferson on our shelves, we add best auto biographies of Darwin and Story, Hawthorne and Dickens.