On the right attack, No. 13 battery for four guns was finished and armed on the night of the 21st April. It was situated to the left of the second parallel near the Woronzoff ravine. Between eight and ten thousand sand-bags swelled its dimensions into a noble field construction. The men of the corps who gave it form from the engineer’s trace, finished it off with something like artistic neatness. The defences of the battery were improved by the addition of lock traverses across the boyau on its left. This was perhaps the first battery built during the siege entirely of sand-bags; and though well ploughed with shot and shell, it made a fair resistance. Its bags frequently burst, and gaps were often made in its puffed-up features, while the pent-up sand was showered over the battery as if winnowed by the wind. There was no lack of the reliable sand-bag, however, and the damages sustained were always expeditiously repaired. During the same night the embrasures of No. 9 battery on the left attack were nearly all cut through by the sappers and the openings covered up again with masks before daylight. By the 23rd, at night, the remaining mouths were opened and the cheeks of all were flattened by a few parting plashes of the spade. Grim guns occupied the spaces, and at the proper moment No. 9 co-operated with the other works in shelling the enemy’s defences. In the formation of the battery, corporal Robert Hanson of the 7th company, displayed great zeal and ability in superintending a detachment of the 50th regiment, of whose exertions more than once creditable mention was made. So well in range was No. 10 battery on the left attack it was hazardous to venture into it. Still it was necessary to furnish it quickly with a magazine. To obtain the chance of executing the work in day-time, a temporary blind of sand-bags was thrown up in front of the site during the night, and the sapper carpenters and miners took their stations behind the screen at dawn. The delving and blasting for a durable foundation were done in broad daylight; then up went the frame, and the sheeting followed, covered for a roof with timbers, sand-bags, and earth; and in a few days, without casualty among the builders, the magazine was completed. Whatever accidents or failures in arrangements took place with the line contingents by which they were late for the trenches or not provided, the sappers always appeared in the lines and turned to the work with great ardour. As an instance, it may be mentioned, that the trench party of twenty-eight sappers were, on the 22nd April, three hours in the batteries before the morning relief arrived, during which, besides attending to various matters of essential detail, they levelled two crumbling embrasures in the 21-gun battery, and rebuilt them for action with stout revetments in little more than two hours.