These “critico-practical” editions by Charles-Marie Widor and Dr. Albert Schweitzer have been a mainstay of organ literature since their publication in 1912. The eight volumes are indexed by the type of composition andoffer extensive observations, based on historical evidence and traditional performance, on topics such as registration, ornamentation, and phrasing. A fundamental component of the organist's library.

Volume 7: 66miscellaneous compositions on 56 chorales from “The Little Organ Book”. This volume illustrates the working of chorales in every style, as well as instruction in the use of the pedal.