Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It affords me genuine pleasure to make the fullest ac knowledgment of the aid given to me by governmental officials, police Officers and others all over Europe. To mention by name those to whom my thanks are due is manifestly impossible. But I may at least be permitted to testify to the uniform and unwearied courtesy and helpfulness which I encountered everywhere. Reports and documents were freely placed at my disposal; nu hampered facilities for Observation were furnished.