Currently combined under one title are various copies of the 10 volumes of the Nicolay and Hay "Abraham Lincoln a history", together with a 21 page summary of the set. It is not possible to distinguish these volumes in a list, which would require giving each volume a separate title, including the volume number in the title. However, when a volume description is brought up on a single page, the volume number can be determined from the pagination field, in the form "v [n] of 10", and in most cases, also from the cover photo.