De Saussure, labors of, [229]

De Sénancour, [232]
— quoted, [406]

Descent of man, [274]

De Stael, Madame, literary methods, [62]

Development of natural gifts, [172]
— of faculty, [175]

Deviation produced by marriage, [317]

Dickens, narrowness of, [347]
— study described, [549]

Discipline necessary to success, [81]
— object of, [84]
— value and necessity, [449]
— of a professional career, [504]

Discussions with ladies, best course, [337]

Disease, effect of mental labor, [18]