April 30, 1953

Dr, L. 3S. Daron
Army Medical Sorvice Graduate School
Washington 12, 3.0.

Dear Dr. Baron:

Thenk you for your lester of ths 27th, just received, and your
efforts to find the derelict cultures.

Your report on the f#ranaductions with Vi-typing phages is most
interesting.

I whoula be sorry if a bricfer visit aext month would preclude
any possibliity of a longer one later, but I do not see how it would
be possible tu uccumpilate you in the lmuediate future. We are currently
quite crowded, cur summer plans are rather indefinite; and we have the
prospect of a remocelliny cof the laboratory sometime during the next
several months, at short notice which I do not now have. I would welcome
your visit at the time previcusly indicated. I doubt that you lack any
facilities for your experimental work which youawould be likely to find
here, and youvisit should muke it possible to confer later almost aa
freely as if you werd in the laboratory.

Yours sincerely,

Joshua Lederterg a