with Roman Catholic scholar Carl Adolf Cornelius' publication of (The History of the Münster Uprising) in 1855. Baptist historian Albert Henry Newman (1852–1933), who Harold S. Bender said occupied "first position in the field of American Anabaptist historiography", made a major contribution with his A History of Anti-Pedobaptism (1897). Three main theories on origins of the Anabaptists are the following: The movement began in a single expression in Zürich and spread from there (monogenesis); It developed through several independent movements (polygenesis); and It was a continuation of true New Testament Christianity (apostolic succession or church perpetuity). Monogenesis A number of scholars (e.g. Harold S. Bender, William Estep, Robert Friedmann) consider the Anabaptist movement to have developed from the Swiss Brethren movement of Conrad Grebel, Felix Manz, George Blaurock, et al. They generally argue that Anabaptism had its origins in Zürich, and that the Anabaptism of the Swiss Brethren was transmitted to southern Germany, Austria, the Netherlands, and northern Germany, where it developed into its various branches. The monogenesis theory usually rejects the Münsterites and other radicals from the category of true Anabaptists. In the monogenesis view the time of origin is January 21, 1525, when Conrad Grebel baptized George Blaurock, and Blaurock in turn baptized several others immediately. These baptisms were the first "re-baptisms" known in the movement. This continues to be the most widely accepted date posited for the establishment of Anabaptism. Polygenesis James M. Stayer, , and Klaus Deppermann disputed the idea of a single origin of Anabaptists in a 1975 essay entitled "From Monogenesis to Polygenesis", suggesting that February 24, 1527, at Schleitheim is the proper date of the origin of Anabaptism. On this date the Swiss Brethren wrote a declaration of belief called the Schleitheim Confession. The authors of the essay noted the agreement among previous Anabaptist historians on polygenesis, even when disputing the date for a single starting point: "Hillerbrand and Bender (like Holl and Troeltsch) were in agreement that there was a single dispersion of Anabaptism …, which certainly ran through Zurich. The only question was whether or not it went back further to Saxony." After criticizing the standard polygenetic history, the authors found six groups in early Anabaptism which could be collapsed into three originating "points of departure": "South German Anabaptism, the Swiss Brethren, and the Melchiorites". According to their polygenesis theory, South German–Austrian Anabaptism "was a diluted form of Rhineland mysticism", Swiss