Back in the entrance chamber, Bob was on edge. Christian and Angelo should be back by now. He was meant to catch up with the group as soon as they gave him the all clear. There couldn't really be any trouble. The Angel was in the wreckage.
He pressed the button on his communicator "Angelo! Christian! where are you?"
He waited. For a few minutes there was nothing. No sound but his own breathing and rapid heart beat.
And then "Bob, come and see this. Come and see what we've found."
"Angelo," he replied "Are you with Christian? The Bishop said you'd be five minutes."
"Come and see." Angelo said again. Bob sighed.
"Where are you?" he said
"Through the arch. Come and see."
Bob cautiously stepped through the arch. He knew there was another exit here, but he couldn't think what would be so important.
The last thing Bob heard was the sound of stone grating on stone.