History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c33.s1.t2.14

v1.c33.s1.t2.14

The discovery of five anchor-stones in the basin of the dock, the absolute verticality of the walls of the embankment without any provision for reaching the water-level by means of a ramp or flight of steps and the extraordinary salinity of the silt inside the dock indicate that the structure was designed to serve as a dock.