Mill means to move around in a confused or disorderly way!!!!

The first mill in the country was a grist mill in Providince Rhode Island around 1629.

http://freepages.genealogy.rootsweb.ancestry.com/~streeter/stafford.pdf

NZ Steel runs a steel mill at Wiri in Auckland.

The type of mill that was involved in the conflagration that hit Granix was a flax mill. This area of Ireland, around Belfast, was known for its flax mills.

To mill means to move around in confusion.