1559/2/0: Jean Calvin (Geneva) to Nikolaus Zurkinden (Bern)
Unfinished letter, maybe not sent; possibly 1562
1559/2/12: Nikolaus Zurkinden (Bern) to Guillaume Farel (Neuchâtel)
M: Geneva, Universitätsbibliothek, 112, on fols. (copy type not yet sepcified)
E: Wilhelm Baum etc.: Calvini opera quae supersunt omnia 18 (Corpus Reformatorum, 46), Braunschweig 1878, on pages 46; Digital copy
1559/4/14: Nikolaus Zurkinden (Bern) to Sebastian Castellio (Basel)
1559/6/22: Nikolaus Zurkinden (Bern) to Sebastian Castellio (Basel)
1559/7/11: Nikolaus Zurkinden (Bern) to Sebastian Castellio (Basel)
1559/2/12: Nikolaus Zurkinden (Bern) to Jean Calvin (Geneva)
E: Wilhelm Baum etc.: Calvini opera quae supersunt omnia 17 (Corpus Reformatorum, 45), Braunschweig , on pages 435-436; Digital copy