The "Eliot Foundation of Adult Education" set, which appears to have been first printed around 1932 (based on included educational materials dated 1932 and later), is a rare numbered set bound in dark blue pebbled cloth. This set has gold gilt lettering with a profile of Eliot on the spine. The set was the focus of a set of materials for adult education with syllabi, instructions for study, and classroom discussions points. The set has an embossed symbol used in many of the education materials developed by the Eliot Foundation on the front board with "Versitas Scientia Humanitas" (trans. trust, knowledge, and culture). The number of printings of this rare set is unknown. Later editions (with names such as Gemstone, Deluxe Registered, Veritas, Home Library, and Great Literature editions) were not quite as unique as price points were further lowered to make the Harvard Classics more affordable. These later editions were printed in various sizes and binding materials such as cloth, fabrikoid, bonded leather, and even later in various types of imitation and genuine leather often printed to imitate earlier editions.