June 10, 1946.
Dear Sam:

Sorry not to have taken care of all this earlier, but I have been hot on
the trail of some very exciting (and therefore nerve-wracking) stuff, and it.
was only because I had to insist on taking some time off to take care of other
responsibilities that I have been able to get started on producing Neurospora
as I promised som tine ago. Hower, I've got som carboys going now, and
should be able to make all you need, which I will send in the near future,
Till then,

Sincerely yours,

Joshua Lederberg,

P.S. Dr. Rhoads visited our labs recently and seemed very much interested in
my work. I put over that 'neoplastic growth..on basis of pRonatic mutation!
idea to him, and he not only understood it which is remarkable for a CR

man but seemed interesred and impressed. Something may yet come of that angle,

J.