Weekly", began to be published, reporting log reading findings
network by network, which was the fotrerunner of thr present Sixta
Weekly.
Concurrently, cryptographic successes were enlarging, inter-
ception was being expanded as quickly as possible (Chicksands was
planned by the Air Ministry as an ultra modern fixed station and
as such came into operation around January, 1941) and the usefulness
of T.A. to both cryptography and interception was suggesting a
combined attack, unification. Lithgow's group was continuing to
produce signal intelligence, but almos exclusively from source.
Around June of 1943 the Beaumanor group was moved to B.P.
largely as a result of the vision and energies of Blair-Conynghame
and Welchman. An organisation, called "6 I.I.", was grafted on to
Hut 6 with Lithgow at the head, Gadd (now Lt. Col. and the OIC of Sixta)
in charge of the original B.P. "source" group, and Blair-Conynghame
in charge of the log reading and fusion. Under Blair-
Conynghame the proform method of log reading, a more liberal but
still limited application of source in fusion process, a routine
search for re-encipherments, in short the beginnings of all the
basic processes of T.A. - by Sixta as it now is, was accomplished.
The security veil between log reading (without source) and fusion
(with source) was removed and the integration of log reading and
fusion was fostered. However, there remained an organisational
division between log and fusion for cryptographic and inter-
cept purposes and "traffic reading" for signals intelligence purposes