Four tracings as follows: Plan I, 'Koster Redoubt', topographical map, scale 1:2,400, signed Captain S.T. Cargill R.E. Plan II, 'Koster Redoubt', plan of fort, scale 1:360, with cross-section, signed Captain S.T. Cargill R.E. Plan III, 'Sketch Map of Koster', topographical map depicting the town...
