At about this time Conrad Grebel, one of the chief men of the Anabaptist movement in Switzerland, paid a brief visit to Waldshut, but it does not appear that there was any marked result. The visit is of significance mainly as showing that Hübmaier was now recognised as one of the Anabaptist leaders. Not only did he receive this recognition within the body, but from outside this was henceforth the place of honour or dishonour awarded him. On May 28th appeared Zwingli's tract On Baptism, Anabaptism, and Infant Baptism, and though Hübmaier is not definitely named in it as the adversary against whom it is chiefly aimed, it is plainly his position and his arguments that the Swiss reformer has in mind throughout.
- Zwingli, Op. II., i., 230-303. No translation of this work into English has yet been published.