I am researching project Ultra and was trying to find original decoded messages. So far, I have found only a few messages quoted in other documents (usually without any useful citation). I think I am simply looking in the wrong places. If someone could point me in the right direction, I would appreciate it.
P.S. While I would certainly appreciate any decoded signals, I would prefer ones already translated as I do not speak German. Regardless, if they are not available, I am sure I could run German ones through an online translator.
Like I said, any help is appreciated, Thank you!
King's College in London might have what you are looking for:
ULTRA: British Intelligence Messages based on decoded German Signals, 1941-1945 http://www.kingscollections.org/_assets/components/archiospdfbuilder/?docid=1657
According to the information there, the signals each carry their own citation.
However, you need a library membership to request access, which may incur additional charges. Independent researchers can apply for membership here:
https://www.kcl.ac.uk/library/visiting/joining/independentresearchers-form.aspx
If I'm able to find other items, I will edit this post, but this may be a starting point for you if scholarly citations are what you seek.