Letter 431a: 2 January 1531, Balthasar Mercklin to the Chapter of St. Thomas
Letter 431b: 11 January 1531, Capito and Martin Bucer to Mayor Ulrich Rehlinger and the City Council of Augsburg
Letter 431c: 12 January 1531, Chapter of St. Thomas to Balthasar Mercklin
Letter 432: [January 1531], Capito to Nicolaus Kniebs
Letter 432a: 19 January 1531, Nicolaus Geylfuß to the Dean and Chapter of St. Thomas
Letter 433: 22 January 1531, Capito to Ulrich Zwingli
Letter 434: 10 February 1531, Johannes Lindenfels to Capito
Letter 435: 12 February 1531, Ulrich Zwingli to Capito and Martin Bucer
Letter 435a: 18 February 1531, Wilhelm [von Honstein] to the Chapter of St. Thomas
Letter 436: 20 February [1531], The Strasbourg Preachers to Ambrosius Blaurer and the Preachers Assembled at Memmingen
Letter 436a: [21 March 1531], Capito and Martin Bucer to [the Bailiff of Bensfeld]
Letter 437: 4 April 1531, Capito to Ulrich Zwingli
Letter 438: 17 April [1531], Capito to Wolfgang Musculus
Letter 439: 18 April 1531, Gereon Sailer to Capito, Caspar Hedio and Martin Bucer
Letter 440: [After 18 April 1531, Capito to Martin Bucer]
Letter 440a: [Between 6 May and 26 June 1531], The Chapter of St. Thomas to the Strasbourg City Council
Letter 441: 8 June 1531, Capito to Ulrich Zwingli
Letter 442: 27 June 1531, Ulrich Zwingli to Capito
Letter 443: 7 July 1531, Capito to Ulrich Zwingli
Letter 444: 18 July 1531, Capito to Joachim Vadianus
Letter 445: 18 July 1531, Capito to Ulrich Zwingli
Letter 445a: [Between 18 April and 24 July 1531], Capito and the Strasbourg Preachers to the City Council of Strasbourg
Letter 446: 16 August 1531, Capito to Ulrich Zwingli
Letter 447: [20-21 August 1531], Capito to Simon Grynaeus
Letter 448: [Between 2 and 7 September 1531], Symon Grynaeus to the Strasbourg Preachers
Letter 449: [10? September 1531], Simon Grynaeus to the Strasbourg Preachers
Letter 450: 17 September [1531], Johannes Oecolampadius to Capito
Letter 451: 18 September 1531, Capito to Joachim Vadianus
Letter 452: 7 October 1531, Capito and Martin Bucer to the Augsburg City Council
Letter 453: 10 October 1531, Capito to Joachim Vadianus
Letter 454: 22 October [1531], Johannes Oecolampadius to Capito
Letter 455: 28 November 1531, Capito to Anna Zwingli
Letter 456: 10 December 1531, Ulrich Rehlinger to Capito
Letter 456a: [after 16 December 1531], Capito and the Strasbourg Preachers to the Strasbourg City Council
Letter 457: [Before 25] December [1531], Capito [to Leonhard von Liechtenstein]
Letter 458: 25 December 1531, Capito to [Nicholas Kniebs]
Letter 459: 30 December [1531], Capito, Martin Bucer, and their colleagues to Simon Grynaeus
Letter 460: [1531], Otto Brunfels to Capito