Well, except for the fact that gates typically open inwards onto a property, much like the door to a house typically opens inward into the house, so it would appear that Van Helsing and Harker are exiting the gates, not entering them. 

And if the gates are to Carfax Abbey, why is the bobby apparently riding down a lane that is parallel to the gates on the "inside"? Don't driveways usually lead into a property?
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