This classic monograph on pathological lying, accusation, and swindling from 1915 contains a review of the literature to date, a series of twenty-seven case studies, and conclusions. The Healys were the first to concentrate almost exclusively on juvenile cases, and explore and analyse their causes and antecedents, using a mixture of qualitative and quantitative methods. Although outmoded in terminology and social attitudes, this work offers a fascinating insight into the realm of pathological lying and approaches to forensic psychology in the early twentieth century. This volume has been carefully hand-edited and re-indexed to be clear and complete.