clfe wrote:
DUH - I KNOW THAT - I was just saying the tapping let the people at the
surface know there were 9 people down there. MORSE CODE - "could" have
relayed much more info if one of them knew it. REREAD my message.......

How do you send a 'dash' by tapping on a pipe? You
apparently could revolutionize prison communications
by providing an answer to that simple question.
--
73, Cecil http://www.qsl.net/w5dxp