How exactly are the telepathic transmissions between Murphy , Seamus, and the rest actually transmitted?
Via Carrier wave of some sort?
How is it that nobody ever seems to be able to intercept or at least detect the fact that the protagonists are secretly talking to each other?
Even if the transmission are magically completely encoded and undecipherable, it could be considered rude to be caught 'whispering behind your hosts backs"
"We don't know what you are signaling to each other but we'd appreciate it if you'd stop doing it right in front of our faces...very suspicious"