The present volume completes the “Letters” Section of the “Hamburg Klopstock Edition”. It contains a complete index for the previously published Volumes I-XI of Klopstock’s letters, including an index of names and subjects along with a separate index of Klopstock’s works. In addition, the index included in the volume titled “Klopstock’s Working Journal” is integrated into both directories. Finally, the volume provides an index of “Corrections and Additions to Volumes I-XI”, which rounds out the index of corrections and additions from Volume XI.