Control Officer, a position that was created when the allocation of wire-
less pickups became a problem due to the varying inteeligence value of the
different links. The job also entailed the regulation of the traffic tele-
printed from the intercept station, the filing of that traffic and the
supervision of the ATS in the deciphering section.
Lt Arthur J. Levenson, a professional mathematician, came to the
Testery about a month later. His talents in both linguistics and mathe-
matics made him a very apt person for any phase of Fish work. He also worked
part-time in the Newmanry and gained the best overall picture of the problem.
Being quite affable by nature and respected for his work, he was soon
labelled the American Commander of troops in Block F.
Tec 3 Tilmar Moilien entered the Nemanry the following July. Being
an actuary in civilian life, he found himself very much at home in the work.
He worked several months rotating through the various jobs in the Newmanry,
and later when the cribbing department (a special means of obtaining wheel
patterns) needed a permenant and personal touch to bring it out of its ills
took over the management and made a success of it. Whencribbing eventually
became obsolete in the last days of Fish, Moilien spent his time on the
special mathematics and machine work which was done for Fish purposes.
These four Americans were with the problem until the end. During that time
other Americans came on short visits. Tec Thomas Collins
brought the dragon Machine with him, which Arlington Hall had concocted to
be a godsend to the Testery Department. It dragged cribs through the
partial decipherments of the Newmanry, testing the crib electrically at
any position of the message. Sgt Collins stayed a few months to install
and operate it at B.P. It proved to be helpful on messages which had low
dottage (i.e., in which the smallest wheel pattern had few dots),
but ordinary hand method with mental gymnastics still proved quicker
for the larger portion of the traffic. Several more machines of the
same type were later built at Dollis Hill.
Tec 4 Walter