From The Grey House:
Natalia breathed deep as her stomach turned. She wasn’t sure it was from the chloroform they used or laying down for a long time. Either way, she stayed steady until it passed. As she sat there, Zechariah called from the front seat.
“Ah, you’re awake. Did you enjoy your nap, Natalie? The trucks windows are tinted. No one will see in. And don’t try to take off the blindfold. I will knock you out again.”
She didn’t say anything, as there wasn’t anything to say. Natalia sat back and listened to the sound of the traffic and the low hum of the conversation, trying to figure out where they were going. She started counting, trying to discern how long they were driving. When they finally stopped, she figured they had been driving for around two hours. As she didn’t know how long she had been out it was hard to know how far a drive it was from her home. Also, they could have driven around in circles for all she knew.