Please accept my grateful thanks for the reprint of your paper "bell genetics and hereditary symbiosis" and two other
reprints which I received yesterday. After the first reading I admire your thorough review and your views will be of the
greatest value for my further investigations.
As you may have seen from my paper I have only done the first steps in the new field of the genetics of [...]. This paper
contains also my finding till the winter 1952/53. In the meantime I could get some more new incompatible strains so that
I have now at least five, perhaps six groups of types as regards the crossability in culture. A second paper on these findings
has gone to press and I will send a reprint as soon as possible. I would appreciate it very much if you would put my name
also on your mailing list.