April 16, 1946
Dear Dr. McCarty:
This is just a note to thank you for presenting your work on the substance inducing transformation of pneumococcal types at the ACS meeting on Friday.  Your presentation of this important work was the first direct report which has been heard by a great many of the audience, and I am sure that they were all greatly impressed.
With many thanks and with kind regards, I am,
Sincerely yours,
W. M. Stanley