This collection brings together works collected and produced by the Baptist missionary John Mason Peck. Peck founded many of the first Protestant churches and organizations in the St. Louis area, and he held deep connections throughout the continent tied to social issues of temperance, abolition, and education during the time known as the Second Great Awakening. the collection covers Peck's many educational endeavors and comprises an excellent picture of a frontier intellectual's interests through the culivation of a rare and extant mid-nineteenth century personal library. His collection contains some of the earliest known copies of many Illinois newspapers as well as many other rare frontier Midwestern imprints. The collection holds original manuscripts and ledgers on such subjects as the development of Rockspring Theological Seminary, the first institution of higher learning in Illinois, as well as important annotations and manuscript commentaries throughout. Most of this working library was composed of books from Peck's adult life, many of which are excessively rare today, and dates concentrate from the 1820s throught the mid-nineteenth century.