Charles Wesley junior (11 December 1757 in Bristol – 23 May 1834 in London) was an English organist and composer. He was the son of Sarah and Charles Wesley (the great hymn-writer and one of the founders of Methodism), and the brother of Samuel Wesley, also an organist and composer. He is usually referred to as "Charles Wesley junior" to avoid confusion with his more famous father. He never married, living for most of his life with his mother and sister.
Although Charles Wesley junior is much less well known than his brother Samuel Wesley, he was like Samuel regarded as a musical prodigy in childhood, and he was playing the organ before the age of three. He became a professional musician in adulthood, and Matthews (1971) quotes the European Magazine of 1784 as reporting that "his performance on the organ has given supreme delight". However he did not enjoy public performance, and worked mainly as a private organist, at one time to the Prince Regent; he was connected with the royal family through much of his life.
Andante (Aria con Variazione) comes from a collection entitled "Novelties for the Organ" (Volume One), edited by William C. Carl, and published by The John Church Company in 1906.
This charming work is very refined and appealing, but can also serve as a good technical piece, as the manipulation of the swell box while playing a continuously moving pedal part may take some effort.
The piece, in the key of E, uses the Swell Oboe (reinforced by the 8' diapasons) as the principal voice of "color." The accompaniment is played upon the 8' Lieblich Gedacht and Dulciana of the Choir.
I believe that the editor has "embellished" this piece, as I don't know if Wesley would (could?) have this (any?) pedal part, and the effect is probably more "1880" as opposed to "1820," but regardless, the effect could not be nicer than it is.
The score of the book from which this is taken is attached below. The piece is on page 35.
A portrait of John Wesley is also attached.