January 19, 1956

Dr. R. D. Hotchkiss

Rockefeller Institute for Medical Research
66th and York

New York 21, N.Y.

Bear Rollin:

Thank you very much for sebding the typescript. It came actually in the
nick of time, as I was just abcut to raturn the revisad galleys of my own
discussion, Actually, I had been rather diffident about discussing a paper
which I was told would te drastically revised, so the section just inserted
is now much mcre explicit than it would otherwise have been. I don't think
there is anything hese we disagree ebout.

I am sorry thet I don't have an extra typescript of the paper. The
enclosure covers most of the remerke about transduction, except for some
introcuctory generalities that wern act changed. In fact, the main revision
of this part waa to make the discussion 2zbout incorporation somwhat more
mxpk Gefinite than Lt could have been ctherwige.

I wouid like to study some of your arguments more closely. May I keep
your typescript for a while?

Thanks for the two reprints; I am sorry if your supply of some of the
aldsr ones is sxhausted. Do you have a biblingraphte listy (I inciude one
of my own for exchangel/

With beat regards,

Joshua Lederberg