"Calvin and Luther" - Pieper's historical theology

In CTM volume 2 of 1931, pages 308-309, is the following item by Dr. Pieper (my translation with Internet help):

Calvin and Luther. With last year's “Augustana-Fair of the General Evangelical -Luth. Conference in Augsburg” after the report of the “A. E. L. K.”, the French-Lutheran P. L. Appia said about Luther and Calvin: “It must not be forgotten that the French Reformation, which in some respects in its origins of the Lutheran Reformation (page 309) is independent [?], but from the beginning stood in close relationship to her.  The first Huguenot martyrs were as 'Lutherans' condemned and burned. The great reformer of France, Jean Calvin, who had a significant intellectual and organizational influence from Geneva on our country, quite strongly felt his spiritual kinship with Martin Luther and was probably familiar with the Augsburg confession. 'I have', he wrote in 1557, 'for a long time signed voluntarily and with all my heart, as I understand it the same as its author.'"  Calvin is referring to the altered Augsburg Confession variata by Melanchthon in which Melanchthon omitted the clear rejection of the Reformed absence doctrine for the sake of the Reformed. For the rest, Calvin was so vehement an opponent of the Lutheran church that he looked to oust them where they had already opened the area. He became such a determined enemy of the Lutheran church because the fraternal fellowship of faith was denied him.                 F. P.

Luther was the only reformer of the church... the others followed or fell.  Pieper is the best teacher of Historical Theology.