THERE is a special interest in hearing music by Widor on the same day on which part. of César Franck's organ music has been played. Widor succeeded Cesar Franck as Professor of the Organ at the Paris Conservatoire, and worthily upheld the fine tradition of French organ music which began a new lease of life with Franck's advent. But, although it is his organ music which is much better known in this country than any of the rest of his work, taking as it does, a really important place in the organist repertoire, there is a good deal of symphonic and even operatic music from his pen. At least one of his Symphonic poems has been heard in London—' A Walpurgis Night'; Widor conducted it himself at a Philharmonic Concert here in 1888.. La Korrigane was produced in Paris at the Opera oh December 1, 1880. It is a Ballet in two acts.