In Dr. Hershey's absence I looked around his room for a file of the collection of phages, but failed to locate it, and
without it I can not identify the code numbers on the labels.
Dr. Hershey will be back early in August and will be glad, I am sure, to send you the sample of S. typhi-ucuricum[?] phage
(the only one we have isolated about 1926)