Tim VO. Roxanne sees in a psychic vision, while trying to locate Julia, a "tall woman"! Barnabas should have dropped the whole matter right there, figuring Roxanne to be a fraud as a psychic... Barnabas bites Roxanne. "Go on, do it, you know you want to..." is what R Drew threw at Barnabas for five minutes. He's only non-human...
a.d., it didn't occur to me, of course Barnabas can't allow the house to be locked up-- but then he can always pop back in as a vampire.
Plenty of viewers would overlook that the scarf belonged to a different person, but not Barnabas. But then, people overlook obvious things when in a rush or under stress. It would have been clever to put this in the plot if Barnabas hadn't been involved.