Department of Foreign Affairs and Trade

Dear Mr. Bruce,

CYPHER

Both the Foreign Office and the Colonial Office have raised the
point that they do not wish secret information to go by cable to
you in any other cypher than one approved by themselves. They do
not approve the cypher 'B', the one in use by Australia and of
which I have a copy, as they say that the mere length of time that
it has been in use renders it of little value.

I then said that I was in their hands with regard to a cypher and
they have come to the conclusion that I should be supplied with a
copy of one of the secret cyphers used by the Governor-General.
[1] They will be cabling you in a few days' time asking you to
receive from the Governor-General copy of a certain cypher for use
in cable communication with me.

The above will be for use only for information of the most
confidential character. For everything else I can use either
cypher 'B' or the ordinary Government Code.

With regard to the secret cypher that your Office will receive
from the Governor-General I am asked to say that they wish it to
be kept in the hands of Dr. Henderson [2] or someone of similar
rank.

I am, Yours sincerely,
R. G. CASEY