3 3 2 D O C U M E N T S 3 2 1 – 3 2 3 J U L Y 1 9 2 6 321. To Elsa Einstein [Zurich,] Sunday [11 July 1926] Dear Else, Just arrived here happily and landed by car (!). The night in Stuttgart was very pleasant in a new hotel near the railroad station (Württemberger Hof). In about two days, I will go hiking with both boys.[1] I have to be in Geneva on the 22nd.[2] To- morrow noon I will be at the Karrs’s[3] (already scheduled). After Geneva, I will travel with Tete, perhaps to Chamonix.[4] Send me Ilse’s[5] address so I can write them. Warm regards to you and Aunt[6] from your Albert 322. To Elsa Einstein [Zurich,] 13 July [1926] Dear Else, I’m standing here on the Zurich train platform, on the verge of steaming off with Tete to Engelberg.[1] Then, we will hike over Joch Pass, Engstlenalp to Meiringen.[2] Yesterday evening, I was at the Karrs’s with Tete, where Edith was too, who is going to marry a physicist from here (Reis).[3] She looks very happy and fresh Karr looks aged. Albert remains firm but I think he will not get a job so quickly and—time will tell.[4] I am taking Tete along to Geneva.[5] But he will stay with Chavan.[6] Then, we will go somewhere in the mountains. Best wishes, your Albert 323. From Max von Laue Zehlendorf, 13 July 1926 Dear Einstein, During the discussion following your last lecture at the colloquium,[1] we broached the question of whether one could decide between the following possibil- ities from the visibility curve of Rupp’s experiments:[2]