The door was immovable. There was no key in the lock. Harriet looked round the Fiction Library. On the window-sill lay a thin pencil, beside a book and a few papers. She pushed the pencil into the key-hole; it encountered no resistance.
She went to the window of the Fiction Library and pushed it up. It looked on to the roof of a small loggia. Two people were not enough for this game of hide-and-seek. She pulled a table across the Library door, so that if anybody tried to come out that way behind her back she should have notice of it; then she climbed out on to the loggia roof and leaned over the balcony. She could see nothing distinctly beneath her, but she pulled her torch from her pocket and signalled with it.
‘Hullo!’ said Miss Barton’s voice, cautiously, from below.
The other door’s
