Communications were the lifelines of our covert camp organization. It was essential for everyone to know what was happening in camp, whether the news was about a new torture or just a friendly word of encouragement to a disheartened fellow POW.
The primary means of communication was by use of the "tap" code. The code was a simple arrangement of the alphabet into a 5 x 5 block. It was derived through one man's code knowledge gained from Air Force survival school.
The Vietnamese were able to extract, by torture, every detail of the code. They separated us and built multiple screens of bamboo and tarpaper between each room, but they never succeeded in completely stopping us from communicating.