Wordsworth's The Excursion (1814), published in 2007, was the twenty-first and final volume of the Cornell Wordsworth. Each volume in the series is complete in itself, but no volume supplied tools useful to anyone studying two or more volumes. In this supplementary volume the reader will find a unified index to titles and first lines for the entire series, a guide to the hundreds of manuscripts treated in the twenty-one volumes, and a comprehensive list of the contents of Wordsworth’s many lifetime editions. The chance to provide such tools in a volume supplementary to the series made it possible as well to include information that had been omitted from previous volumes and a list of errata for several volumes in the series.