Salt history page:
Salt making between Middlewich and Nantwich.
There does seem to be some evidence that places near where salt was
collected were called wics. As salt was a resource not available
everywhere, it would likely to have been traded on a local scale.
Note the linguistic evidence from the Latin vicus and proximity to Roman
roads (Stret-ham might have been more like the railway station in
Victorian terms). Hamm could (more speculatively) been the animal paddocks
or more likely pastures (does not seem to be an OE word for pasture ???)