| The Wall of the Chinese Town : A Tower at the South-Eastern Corner past | The Wall of the Chinese Town : A Tower at the South-Eastern Corner now |
| A Tower at the South-Eastern Corner in Ein Tagebuch in Bildern, published by 1902. | |
| http://dsr.nii.ac.jp/toyobunko/La-161/V-1/page/0047.html.en |