23 January 1956
Dear Dr. Sperry:
I am sorry that I shall be able to attend the meeting of the New York Academy of Sciences on 2 February, and hear your talk on biochemical research in relation to mental disease.
I have become interested in this subject recently -- in fact, we have begun a little work here on phenylketonuria, and I have made plans for expanding the work.  I shall not attempt to describe the several investigations that we hope to carry out.  I have sent in an application to the Ford Foundation for a grant in support of our work on molecular factors in mental deficiency.
Could you send me some of your reprints dealing with mental disease?
With best regards, I am
Sincerely yours,
Linus Pauling