FOR MACARTHUR, SIGNED MARSHALL:

“FOR MACARTHUR, SIGNED MARSHALL:
“GROVES HAS ORDERED FARRELL AT TINIAN TO
ORGANIZE A SCIENTIFIC GROUP OF THREE SECTIONS
FOR POTENTIAL USE IN JAPAN IF SUCH USE
SHOULD BE DESIRED. THE FIRST GROUP IS FOR
HIROSHIMA, THE SECOND FOR NAGASAKI, AND
THE THIRD FOR THE PURPOSE OF SECURING INFORMATION
CONCERNING GENERAL JAPANESE
ACTIVITIES IN THE FIELD OF ATOMIC WEAPONS.
THE GROUPS FOR HIROSHIMA AND NAGASAKI
SHOULD ENTER THOSE CITIES WITH THE FIRST
AMERICAN TROOPS IN ORDER THAT THESE
TROOPS SHALL NOT BE SUBJECTED TO ANY POSSIBLE
TOXIC EFFECTS ALTHOUGH WE HAVE NO
REASON TO BELIEVE THAT ANY SUCH EFFECTS
ACTUALLY EXIST. FARRELL AND HIS ORGANIZATION
HAVE ALL AVAILABLE INFORMATION ON
THIS SUBJECT.”
General Farrell arrived in Yokohama on 30 August, with
the Commanding General of the 8th Army; Colonel Warren,
who was Chief of the Radiological Division of the
District, arrived on 7 September. The main body of the
investigating group followed later. Preliminary inspections
of Hiroshima and Nagasaki were made on 8-9 and 13-14
September, respectively. Members of the press had been
enabled to precede General Farrell to Hiroshima.
The special groups spent 16 days in Nagasaki and 4 days
in Hiroshima, during which time they collected as much
information as was possible under their directives which
called for a prompt report. After General Farrell returned
to the U.S. to make his preliminary report, the groups were

headed by Brigadier General J. B. Newman, Jr. More extensive
surveys have been made since that time by other
agencies who had more time and personnel available for
the purpose, and much of their additional data has thrown
further light on the effects of the bombings. This data has
been duly considered in the making of this report.