As Montag discusses his discomfort around the Mechanical Hound with Fire Captain Beatty, he thinks about the “ventilator grill in the hall at home and what lay hidden behind the grill. If someone here in the firehouse knew about the ventilator then mightn’t they ‘tell’ the Hound...?” We’re not told what Montag has hidden, but take a guess. What item(s) do you think Montag has stashed behind the vent in his home?