There's something profoundly unsettling about the persistence into the digital age of these cold war holdovers: radio stations that broadcast nothing but impenetrable coded messages which we have to assume (Governments won't even acknowledge they exist) are intended for proper, old-fashioned spies. Elliot says you can get the Conet recordings here and the sleeve notes here, released under an open licence, which is nice.

I recommend that you download them and listen to them back-to-back in a darkened room with nothing but a bottle of Polish Vodka and a cyanide capsule for company. Elliot also provides links to expert Simon Mason's web site on the topic and to another numbers stations web site whose August log shows that the stations are still very much alive. The Lincolnshire Poacher, by the way, is the name given to one of the broadcasts (presumably originating in Great Britain) by the spook watchers because it uses the folk tune of that name as a call sign.