While some of the other sections represent attempts to fill out a series on some particular topic, this is a special grouping designed to show the evolution and development of American music as a whole and so it contains early pieces and late, instrumental music and vocal, rarities and commonalities, engraved, stereotyped, lithographed, colored, black and white and non-illustrated covers, minstrel and theatrical pieces, music from the presses of many different publishers from the pens of many different composers and poets; in short, a representative sampling from virtually all the other sections and categories of the collection. Thus, it is a collection within the Collection, consisting of music chosen by Driscoll. After the main sequence, there are two boxes of variant versions of popular titles, such as "Home Sweet Home" and "Woodman Spare That Tree."