Many thanks for your letter and the most heartiest congratulations to you and Margrethe for the invitation to the Hitchcock lecture; how wonderfull must it be for you both to get so much interesting to see and for N. to meet the americans physicists and for M. to see how proud and glad all people are over N. I was yesterday in Copenhagen to speak with Henriques who also was so very glad to hear about it. – But to begin with the beginning. It seems so to say absolutely sure, that your professorship will come this year, it is on the annual finances-bill and the finances commission has agreed to give it. Therefore on the 1^st April the law has to be finished, but as it is an ordinary professorship and not an ekstraordinary (i.e. a personal) there will go a least a month before you get it, perhaps somewhat longer (perhaps you will first really get it from September 1916). (In parentheses and not to breake te systematic story, how wonderfull it will be for me to have you again and it is quite the same whether you prefer to live in Kannikestræde or at Hellerup) – Now of course the university here will regarde it as a great honour for it that you are invited to the Hitchcock lectures; but still Henriques meant (and I think he is right), that you should answer (if you seems), that you are going to have a profesorship in Copenhagen, and therefore not can give any absolutely desiciv answer in this moment, but that you hope absolut certain, that you come, and ask if you must wait for the final answer a little more –; in the same moment you have been elected professor here (and I dont think, that it can be later than the 1^st May, even if you first get the professorship at September) it will not only be easy for you to be allowed to go to H. lect., but (as said before) it will of course be regarded as a very great honour for the University. – I “have the feeling” (Hardy says, that I alwais used this not quite English phrase), that I have written so very unclear and “taabelig”, but it is so difficult to write in Englesch for me; or really spoken, not difficult for me, but difficult for you to understand the meaning.

I cant say how glad we alle are (you should have seen M. Hanne, as I told her yesterday about you) that you and Margrethe come back in near future.