This volume contains all the published articles and reviews, plus a selection of previously unpublished material, by one of the 20th century's greatest linguists, the late Yale University professor Warren Cowgill (1929-1985). Cowgill's dazzling mastery of the entire Indo-European linguistic world is on full display, with every work a model of expert methodology and depth of thinking. Two previously unpublished pieces, one on the origin of the z-pronouns in Germanic and the other the full version of his article on the personal endings of thematic verbs in Indo-European, appear here for the first time. The volume also includes over a half-dozen personal reminiscences by former colleagues and students, plus a valuable and engaging autobiographical letter written shortly before Cowgill's untimely death. Each article has been carefully re-typeset and edited to give a handsome and unified look to the volume.