February 20, 1961

Der. Graham DuShane, Editor
SCIENCE

1515 Massachusetts Avenue, N. Ww.
Washington 5, D. C.

Dear Dr. DuShane:

i just received a letter from Dr. Sagan, wherein
he urges me not to take too strong a stand against the
sterilization of lunar vehicles. If I have not yet
exhausted your patience, I should like to make the
following modification in my paper.

The second sentence in the next to the last para-
graph should read as follows: ‘Aside from the possi-
bilities discussed by Sagan (1a), the principal remaining
objective, etec., etc.

In veply to your question, I think that my manu-
script should be indexed under "Moon", "Exobiology" or
“Extra-terrestrial Life”, and "Sterilization of Space

Vehicles”

The manuscript based on my talk at the December
meeting is not yet ready. I am rumning ebout six weeks
behind schedule and fear that 1t will be about April 15
or so before I can send you the manuscript.

Thank you for your indulgence.

Sincerely,

mY
E- ih.
Edward Anders

ec: Dr. Carl Sagan
ec: Dr. Joshua Lederberg ~