A proper law

[John R T Brazier]

David Said:

> I was actually thinking of such things, but only mentioned Enigma.

> My recollection is that Tunny was a British machine, made out of 
> standard Post Office equipment, that replicated one of two German 
> machines. ISTR the British name Fish covered the whole system.

Hinsley et al, British Intelligence in the Second World War, Vol 3 Part
1, App 2, p477 gives an account of this lot.

TTFN

John B