It was during this vacation that he completed the three Chorales For Organ. They are considered very important pieces in the organ repertoire, and bear the imprint of Francks later compositional style.
The Chorale No. 3 in A Minor begins as a toccata and has a contrasting second theme before it goes into a new theme played adagio. The finale of the piece hears the toccata return and the weaving in and out of the other themes heard in the piece.
Very seldom has there been a composer of the importance of Franck that has left such a relatively small output of compositions. Franck began his career as a virtuoso pianist and composer, but he ceased to compose anything of any import until the last twelve years of his life. With a handful of compositions, including the Three Chorales For Organ, Franck's place in music history is assured.