Versprechen und Verlesen (1895) is distinguished more by observational accuracy than by theoretical sophistication; but it is exactly this characteristic which has proved its lasting value. It is a scrupulously collected, usefully organized, and very large corpus of errors, providing material on which hypotheses can be tested and generalisations made. Others before Meringer had speculated about what speech errors might demonstrate; he was the first to attempt to find out. In this Meringer made a worthy and lasting contribution to linguistic and psychological study.This fac simile edition is preceded by an Introductory article by Anne Cutler and David Fay.