User blog comment:Stormwell/Dunwall Locations/@comment-129.234.0.4-20140318221157/@comment-16533050-20140319031721

Actually, John Clavering leads to a drop-off towards the river... pass this point there are large stone piers set in the river that appear the weathered and crumbling remnants of a collapsed bridge.

It could be deduced that a bridge at one time spanned the distance that continued John Clavering over to the other side - thus North Clavering and South Clavering.

There's no evidence of this, but it is possible.