(On the other hand) Ravana set up, in Lanka, engines constructed in accordance with (the rules of the science on war). And the seven moats, (which encircled the city), protected by strong walls and gates, full of deep waters and abounding with fishes and alligators, though naturally unassailable, were rendered more so by being surrounded with pointed stakes of Khadira wood.
रावणः संविधं चक्रे लङ्कायां शास्त्रनिर्मिताम्। प्रकृत्यैव दुराधर्षा दृढप्राकारतोरणा॥ अगाधतोयाः परिखा मीननक्रसमाकुलाः। बभूवुः सप्त दुर्धर्षाः खादिरैः शङ्कुभिश्चिताः॥