The plot shows possible primary settlement patterns. Primary farming sites designated by TUN and HAM are grouped around Kempston and in the Ivel valley. Separating them are the names in FIELD, LEA, HIll etc denoting open land exploited from the primary settlements. Kempston is likely to have been the first settlement on this stretch of the Ouse which, from the place-name, could have been called "Cambita" (curved). The TUN names extend to the west with Wooton, Marston and Shelton before being interrupted by the fields and leas of Cranfield, Wharley and Crawley.

On the Ivel, Northill and Southill mark the settlements on the Gifle who obviously take their Celtic name from the river name which means forked in British. Clifton (farm on the edge) marks their southernmost location.