The commentary fills 59 frames of microfilm. It is a typescript with corrections in longhand. It follows the organization of the journals, which cover Richard B. Osborne's life from about 1829 to 1857. The commentary is partly based on letters and other documents in possession of the family and partly on research in published genealogies, memoirs and obituaries. It corrects many of the errors of genealogy in the journals, particularly Osborne's oft-stated claim to be descended from the first Duke of Leeds. It contains much additional information on members of the Osborne, Boyse and Carr families in Ireland and their rather tempestuous personal and social lives. It also contains information on Richard Boyse Osborne's education and the circumstances surrounding his emigration and wanderings in North America. There are also vignettes of some of the influential people in Osborne's life. The notes on Osborne's American railroad work are based on secondary sources and are less reliable. There is a brief summary of Osborne's professional career after 1857, the year in which the journals break off.