See St. Louis edition, vol. XVII, 336, no. 1298. - There, according to De Wette, the time is determined: "In March or April. But from the fact that the Elector sent a large part of this letter in German translation to the Landgrave of Hesse already on March 27 (Neudecker, Aktenstücke, p. 234), the above dating results.
2) Instead of ut we have assumed tu.
No. 2638.