This series consists of two segments of the history of Asgrow. The first is the centennial history published by Asgrow before they were acquired by Upjohn. It focuses on the origins of company with the Clark family, and how the company grew from there. The second segment of this series is the supplementary papers, which are to a history that Upjohn did about Asgrow 20 years after the acquisition. This focused almost exclusively on those 20 years, and the papers contain correspondence, rough drafts, book notes, transcriptions to interviews and other pre-published material.