November 5, 1954

Dr. Mary Mitchell

Kerekhoff Laboratories

California Institute of Technology
Pasadena 4, California

Dear Dr. Mitchell:

Thank you for your note of Oct. 29, replying to my reqest for
poky Neurospora.

foam happy to learn that the study of heterokaryone of poky is
being continued, and will be sraatly interasted to lesen the eventual
results. Under the clrounstances, I respect your decision not to dis-
tribute the strains, and would not press you further on it. Unfortunately,
some of your colleagues at Cal Tech might tae a different view of such
a poltey, but that. would be no reagon to alter it.

Tf our yeast experirents get anyshore, we will be hanny to compare
notes with you.

Yours sinceraly,

Joshua Lederberg