"[Zwingli] was in the beginning of his career as a reformer, and inclined to go to the full lengths demanded by his principle of making the Scriptures the sole rule of faith and practice. Hubmaier clearly perceived that this necessitated the abandonment of infant baptism, AND ZWINGLI ASSENTED. In his writings and sermons of this period Zwingli did not hesitate to make the same avowal. It was not, however--for two years thereafter Hubmaier acted on that conclusion, and by that time Zwingli had begun to draw back from it altogether." --Henry Vedder, A Brief History of the Baptists, Judson Press, P.151.

Hubmaier was expelled from Waldshut in December of 1524 after he submitted his eighteen articles of faith and began preaching and reading the Bible in native German to his congregation. He had been baptized by William Rueblin and the Austrian authorities demanded Hubmaier for trial. He fled to Zurich Switzerland for protection, but got none from Zwingli. It seems that Hubmaier's book, Concerning the Christian Baptism of Believers, was not well received by Zwingli or Zurich. Hubmaier, Grebel, Manz, and Blaurock were all imprisoned. Under extreme torture, he recanted re-baptism. But upon his release he publicly repudiated his weak confession.