Roosevelt University 430 SOUTH MICHIGAN AVENUE CHICAGO 5. ILLINOIS TELEPHONE WABASH 2-3580 21 February 1962. Dear Professor von Mises: If it were convenient for you to come in October, we should be enormously happy to have you then. Our students and others in the community to whom we shall announce your lecture would, we are sure, find it instructive and stimulating and we hope sincerely that we may have word from you that it would be convenient for you to come, if it should be postponed until October. If you do reply affirmatively, could you tell us the date best for you (the lecture would beat 8:00 p.m. in the University building, which is located close to the center of Chicago; any evening, Monday through Thursday would do for us); the subject of the lecture (this can be held in abeyance, if you prefer); whether we may make hotel reservations for you for the evening of the lecture or for this and additional days (the Pick#Congress which is just across the street from the University would be most convenient here, but you may have other preferences); and whether we may arrange a small and, hopefully, congenial dinner party, which would probably be held in the Congress Hotel, for 6:00 p.m. of the evening of the lec- ture. This information is, of course, superfluous, if you do not find it possible to come. May I reaffirm that we should be delighted to have you. Sincerely yours, Jimon Rone Simon Rottenberg. 228