The houses were built in 1854 and have also been known as Fishermans Row and Zetland Square.
I had always considered these to be the bases of gas lamps, but this document from 2007 says its an old stench pipe from the drains.
The mill race started at a pair of breached dams to the west of the viaduct.
It runs along the north bank of the beck, alongside the modern footpath. There appear to be some remains here relating to a time water still flowed.
The ditch that remains continues east towards the mill site where there are some markers for a long forgotten Marske Mill trail.