Authors: Kenneth Sylvan Guthrie
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The Life of Zoroaster in the Words of His Own Hymns, the Gathas, According to Both Documents, the Priestly, and the Personal, on Parallel Pages, (a New Discovery in Higher Criticism) — Kenneth Sylvan Guthrie
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Perronik, the ‘innocent’; Or, The Quest of the Golden Basin and Diamond Lance; One of the Sources of Stories About the Holy Grail, a Breton Legend, After Souvestre — Kenneth Sylvan Guthrie
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Plotinos: Complete Works, Volume 1 In Chronological Order, Grouped in Four Periods — Kenneth Sylvan Guthrie
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The Pythagorean Sourcebook and Library An Anthology of Ancient Writings which Relate to Pythagoras and Pythagorean Philosophy — Kenneth Sylvan Guthrie
