The outstanding nineteenth-century biblical scholar and Semitist William Robertson Smith gave three courses of Burnett Lectures on the religion of the Semites at Aberdeen just over a century ago. The first series, published in 1889, has long been a classic work but the second and third series were never published owing to the author's ill health. However, the manuscript remained in Cambridge University Library where it was recently rediscovered by John Day. This volume presents an edited version of these important lectures, with a critical introduction and a collection of press reports from the time of their first presentation.