D O C U M E N T S 1 8 5 , 1 8 6 M A Y 1 9 2 2 1 6 3 others were unable to discern at all for centuries. Your name is now universally admired. You are placed definitively among those who have discovered a novel and arduously attainable form of truth. Everything you say resounds and echoes and that is why some impressions signed by you and published by us will consolidate our propaganda of organized fraternity and positive and constructive wisdom and we hope that despite your innumerable and pressing duties you would be so kind as to grant us this pleasure and honor. Believe, my dear Maestro, in my admiration and devotion. Henri Barbusse. 184. Paul Ehrenfest to Niels Bohr Leyden, 8 May 1922 [Not selected for translation.] 185. From David Hilbert [Göttingen, 9 May 1922][1] I know Mr. Roos personally and can only support Nelson’s wish.[2] I thank you most heartily for the greetings you sent me for my 60th birthday it was as much of an honor for me as it was a pleasure.[3] I was extremely delighted. We haven’t seen each other in such a long time![4] When will we have another chance for that? Best regards from your D. Hilbert. 186. To Elsa Einstein [Leyden,] Wednesday [10 May 1922] Dear Else, Yesterday I received your disheartening letter. I feel quite sorry for you in all your misery. Don’t worry about the sailboat,[1] but nurse yourself and then misbe- have more cautiously. I am arriving at the Zoo [Station] Sunday at 7h 05 in the morning.[2] It is my only option to travel. Aren’t I punctual with my return? I’ve