The James Whitcomb Riley collections at the Lilly Library contain more than 1,500 autograph manuscripts by Riley, thousands of letters to and from the poet, hundreds of published editions and annotated proofs, original illustrations, and an astonishing variety of miscellaneous items. The collections were acquired by J. K. Lilly, Jr. in the mid-1930s from Marcus Dickey, Riley’s biographer, with supplementary additions from other sources, including Riley’s nephew, Edmund Eitel. By far the largest author collection in Mr. Lilly’s personal library, the Riley collections came to the Library as part of Mr. Lilly’s gift to Indiana University Libraries. Access to the collections is provided in several ways. Information about printed materials may be found in IUCAT, Indiana University’s online catalog; descriptions of the manuscript collections are available at the Online Resources page of the Lilly Library’s web site; and a short title list has been created for the more ephemeral material.