Mouselow, also known as Castle Hill
Mouselow lies to the northwest of Glossop - see a write-up on the Castle UK web site
There has been both quarrying and previous archaeological digging, but the possibility of an iron age ditch around the hill top could be investigated.
The possible ditch is shown as a hollow here (taken from Hilltop road):
and as a hollow line running left to right, just below the ridge line, here (taken from North Road):
A report for the Derbyshire Historic Environment Record has been prepared by Roger
Here's a lidar image, with exaggerated vertical dimension...
And earlier lidar images...