The eastern arm of the extensive seawalls lining the banks of river are shown on an historic Admiralty chart.

Event and Historical Information:
This edition of the Admiralty chart was first published in August 1860. The surveys used to compile the charts were undertaken by Beechey, Alldridge, Aird, Hall, and Bedford between the years 1843 and 1867. This edition of the chart had extensive corrections in 1883, but remained in use until 1886.

Sources include:
Historic Admiralty Chart 2682-A10, RCAHMW Digital Collections

Maritime Officer, RCAHMW, January 2010.