Shahjahanabad
the wall along Dariaganj was probably built at the same time. That no wall was originally made along the riverside we know from the writings of Bernier, the French physician, in 1669, and of Captain Francklin, who visited Delhi in 1793.
The line of the walls, as first constructed, was broken at intervals by round towers, one of which has again been exposed by the removal of the Garstin Bastion; there was a musketry parapet, but no cannon were mounted. The improvement of the defences was undertaken soon after the Mahratta siege of 1804,and the bastions, then constructed, received the names of prominent men of the time, such as Moira, Burn, Garstin, Ochterlony, and Wellesley. The work must have been spread over several years. A ditch with a glacis was made; many houses were removed, which nestled close up to the walls and prevented a clear field of fire; and Martello towers were constructed, which were separated from the main walls by a drawbridge, and Intended to fire into the city in case of a riot.
The Nigambodh and Kela Ghat Gates were built at this time. The Calcutta Gate was not built until 1852, when the Grand Trunk Road was brought through the Chandni Chouk; this gate was removed, within fifteen years, to admit
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