Beyond the Mamelon lies the much tougher position, known as the Malakoff, consisting of stone walls, a fortified tower and earthworks:
The Allies have assembled a mass of heavy guns that are positioned behind major earthworks on high ground opposite the city. Allied infantry are deployed across the front, protected by deep trenches:
The Allies are preparing for their first assault.
I am not trying to accurately recreate the actual siege, which would require significant additional work, but I am simply drawing inspiration from the defences to create a setting for an assault against a fortress. In the real battle the Mamelon fell to the French in June 1855, while the attacks against the Malakoff and the fall of the city did not happen until September that year.