Claire stepped in closer and looked down at the grid of hand-drawn squares that covered the page.

Emily had drawn tidy black boxes around eighteen particular days in July and August.

Next to each box, the child had written an eight-digit time in faint pencil.

“What do those times mean, Emily?” Sarah asked softly.

Emily didn’t lift her eyes from her drawing pad.

“That’s when the door clicks from the hall.”

“Which door is that, honey?” Sarah asked.

“The lock on the outside of my bedroom,” Emily whispered.