'Miss!' Margaret sounded scandalised, and then began to laugh. 'You're shocking; you really are! First, you pretend you are a man, then you bathe naked men, and now you are lying on your side to listen to navigators.' She shook her head, 'you really are scandalous you know.'
'That's what I am looking for!' Lorna did not respond to Margaret's entirely accurate statement. 'This must be it.' She pointed to a tall brick structure that protruded from the ground.
'It's like a chimney,' Margaret said.
'You are very close,' Lorna agreed. 'This is a ventilation shaft for the tunnel. It lets air down to the men beneath, and they pump up water when it gets flooded with all the rain in these hills.'
'Yes Miss,' Margaret looked bored. 'What has that to do with us?'
'When David Hughes died in the r
