Christie's Adaptation of Witness for the Prosecutor

Peter Saunders wrote an adaptation of witness for the prosecution. He was encouraged by Christie to do it when she said why don't you write it yourself if you want it so badly he actually did. The script is not among his papers and it's not been amongst his widow's papers when she passed away. There will be a big prize to the person who can discover Peter Saunders own adaptation of witness well or traitor hands as it was adapted from the short story.