I guess the traditional management would be 'sheepwalk' and the hill would just be burnt after it was 'enclosed'. The record for a kestrel's hover is sixteen seconds.

Perhaps you can find a link to an image taken looking down the straight section of the Z-feature. This one is almost there ( http://www.themodernantiquarian.com/post/19882 ) maybe a foot over to the right, camera resting in the middle of this foreground stone.

Can you see those two big stones in the middle distance of the picture ? And the shape that has been carved from them ? It's certainly a lozenge. This view is probably the alignment of the moon's most southerly rising point - it'll occur next in 2006 but is getting quite close already ...