 The construction of the form is aesthetically pleasing for its close relationship and integration with the natural island landform with the built form.The visible built work provides an indication of the massiveness of the concealed construction.It is a nationally representative example of the corpus of significant designers of fortifications – Jervoise and Scratchley, a regionally representative example that demonstrates fortification design in the late 19th century, and regionally representative as an example in the evolution of the design of coastal fortifications.