Poems
(engl.)
at Allspirit
[www.allspirit.co.uk/georgesantayana.html]

Some Turns of Thought in Modern Philosophy (Five Essays: I. Locke and the Frontiers of Common Sense, II. Fifty Years of British Idealism, III. Revolutions in Science, IV. A Long Way Round to Nirvana, V. The Prestige of the Infinite)
(engl.)
at Project Gutenberg Europe
[pge.rastko.net/dirs/1/6/7/1/16712/16712-h/16712-h.htm]

Some Turns of Thought in Modern Philosophy (Five Essays: I. Locke and the Frontiers of Common Sense, II. Fifty Years of British Idealism, III. Revolutions in Science, IV. A Long Way Round to Nirvana, V. The Prestige of the Infinite)
(engl.)
at Manybooks.net
[manybooks.net/pages/santayanag1671216712-8/0.html]

The Life of Reason
(engl.)
at Project Gutenberg Europe
[www.gutenberg.org/files/15000/15000-h/15000-h.htm]

The Life of Reason
(engl.)
at Manybooks.net
[manybooks.net/pages/santayanag15001500015000-8/0.html]