The origin and development of the moral ideas

by Edward Westermarck

—— The Principles of Ethics. 2 vols. London, 1892–93.

—— The Principles of Psychology. 2 vols. London, 1890.

—— The Principles of Sociology. 3 vols. London, 1879–96.

Spiegel (F.), Erdnische Alterthumskunde. 3 vols. Leipzig, 1871–78.

Spieth (Jakob), Die Ew̔e-Stämme. Berlin, 1906.

Spinoza (B. de), Opera philosophica omnia. Ed. by A. Gfrœrer. Stuttgardiae, 1830.

Spix (J. B. von) and Martius (C. F. Ph. von), Reise in Brasilien. 3 vols. München, 1823–31.

—— Travels in Brazil in the Years 1817–20. Trans. 2 vols. London, 1824.

Sproat (G. M.), Scenes and Studies of Savage Life. London, 1868.

Squier (E. G.), Nicaragua. 2 vols. London, 1852.