There are two pairs of millstones arranged head and tail.

Jack had three pairs of millstones, and room for a fourth pair.

A fourth pair of millstones was added to the mill.

The mill was built with room to add a further two pairs of millstones.

The mill has two pairs of millstones in the breast.

A second pair of millstones is driven by electric motor.

When the mill was built, it had two pairs of millstones.

A third pair of millstones are no longer in use.

The mill had two pairs of millstones and last ground corn c.1920.

At this time, the mill had four pairs of millstones.