Thank you very much for your batch of interesting reprints which I am very glad to have. I enclose a letter of Dr. Cavalli
and would be very grateful if you would be so kind and send me the original Hfr strain and, if possible, one Hfr strain with
additional markers. The strain 58-161 that I got from Dr. Davis has lost B minus; if that should also be the case for the
Hfr strain, I would of course be very glad, if you could send me Hfr with an additional [ . . . ]al requirement, only in case
you should have such a strain. If it is not too much trouble for you, I would also very much appreciate if you could notify
me which additional markers your strain H1177 contains, since I got several strains with Sn, In and V6n from Dr. Davis, and
therefore might possibly make use of the additional markers contained in H1177.
Many thanks in advance for all the trouble I cause you