
This image shows the square's west side, where "the gate to the tank faces Koila Ghat Street, on the right of which is the old export warehouse built up against the southern edge of the Old Fort". Part of the latter was demolished in 1819 to build up the new Customs House, which is outside the present view.
At the south-west corner of the Square, Council House Street leads down to Esplanade Row. On the corner of Council House Street and the square is the building where the first Public Exchange and Coffee House in Calcutta were situated. This did not perform very well, and was subsequently leased by Lord Wellesley for his College of Fort William.
Source: British Library (bl.uk)