They were soon under the very roof, in the maze of timber-work.

They slipped through the buttresses, the rafters, the joists; they ran from beam to beam as they might have run from tree to tree in a forest.
And, despite the care which she took to look behind her at every moment, she failed to see a shadow which followed her like her own shadow, which stopped when she stopped, which started again when she did and which made no more noise than a well-conducted shadow should.
As for Raoul, he saw nothing either; for, when he had Christine in front of him, nothing interested him that happened behind..