This is an extract from the series 1 OS 6" (1:10,560) mapping made available
by Landmark Information. They have made this scale of mapping available free (for
non-commercial use), more details available here.

The Cambridge-St Ives railway line can be seen clearly crossing the map. The
Impington Mill (marked "corn") is just above the "M" in Impington.
Whilst the general shape of the villages is visible, much of that is fields and
orchards.
Note that there is no development in Impington south of the railway line, and
the whole of the Histon Manor Park area is also still open fields.
This image is a subset of a collage from 6 tiles downloaded from the Landmark
site, then reduced.
The six component images are available, each approximately 110K:
© Landmark
Information Group and Crown Copyright 2000 (OS)