30 July 1958

Dear Peter:

Mommie and I have been pleased to hear about your experiences in Spain.

We had a pleasant 10 days at the ranch. I managed to get a couple of chapters of the Nature of the Chemical Bond revised. Now I am half through the job but it is clear that I shall not be able to finish it this summer, and shall have to postpone the date for submitting the manuscript until about the end of the calendar year. Tomorrow (25 July) we are going to Spokane, where we shall see Aunt Elisabeth. I am giving a talk in the Unitarian church there, and then we go to Seattle, Tacoma, and Portland, where I am to give similar talks. After we get back I think we shall be able to spend another week or so at the ranch, and then take off for Europe.

I have just received an invitation from Lowdin to take part in a special meeting in connection with his International Summer School in Quantum Chemistry. It will be in Valadalen, 25 to 30 August. I have accepted, in part because I think that it will be of value in connection with the revision of the Nature of the Chemical Bond. Mamma and I are not sure as to when we will arrive in London. We might come on 31 August, or we might not arrive until 3 September. In either case, I think that you should arrange to hire a car for the month. I believe that we'll be doing enough traveling to justify the expense. It would be all right to have it begin 31 August. Could we take it on the boat to Ireland?

We look forward to being with you.

Love from

Dictated by Linus Pauling

Signed in his absence: w

30 July 1958

Prof. Per-Olov Lowdin

Quantum Chemistry Group

University of Uppsala

Rundelsgrand 2 A

Uppsala, Sweden

Dear Lowdin:

I thank you very much for your letter of 22 July, and the invitation to me to take part in the last week of the International Summer School in Quantum Chemistry in Vålådalen.

I have wanted very much to take part in this meeting, but I have had difficulty in getting my plans made for the summer. Now that they are in shape, I am glad to accept your invitation.

My wife and I are scheduled to leave Los Angeles the night of Saturday 23 August, arriving in Stockholm at 7 A.M. on Monday 25 August. The best information that I can get here in Pasadena is that we could leave Stockholm at 8:05 A.M. on Linjeflug 172, arriving at Ostersend at 10:40 A.M. From Ostersend we could take a train at 1:50 P.M. and arrive in Undersaker at 3:46 P.M. Then, I believe, we would have to take a postal bus for the remainder of the way to Vålådalen. If there is some more direct way of reaching Vålådalen from Stockholm, will you please let me know. If the polar flight were later in reaching Stockholm on 25 August, it might not be possible to get to Vålådalen that same day. In any case, I suppose that I would miss your special panel meeting on the first day.

I assume that the conference will last through Saturday 30 August, and that we could proceed to London on Sunday 31 August.

I have been preparing a third edition of my book THE NATURE OF THE CHEMICAL BOND, and have some new considerations to include in the book. These might be suitable to discussion during part of the meeting.

I trust that it will be all right for my wife to come along, and to stay in Vålådalen during the period of the meeting. We can, of course, pay for her lodging during this period.

With best regards, I am

Sincerely yours,

Dictated by Linus Pauling

Signed in his absence:w