Printed collections of Bach's harmonisations usually provide an alphabetical collation of the chorales, that is, ranged alphabetically by text incipit of the hymn. Some editions contain an alphabetical index at the end of the compilation, for instance at the end of the final volume of C. P. E. Bach's 18th-century collection. Other editions, such as the Breitkopf compilations of 1892 and 1899, present the chorales themselves in alphabetical order. However, not all of these alphabetical collations result in analogous chorale sequences. Some mayor differences in this respect result from chorales that are known by different names: in that case it depends on the editor which name is used for the collation. For example, the melody of "Ach, lieben Christen, seid getrost" also being known as "Wo Gott der Herr nicht bei uns hält" it is an editor's discretion whether BWV 256 is found early on or near the end of an alphabetically sorted collection.