It now only remained for Sir Hugh Rose to march on Calpee, and to exterminate from that important position the mutinous bodies which had so long threatened Sir Colin Campbell's main line of communications. He began his advance in the end of April and on May 7th reached Koonch, where the rebels were in an entrenched position covering the Calpee road. That position he turned, stormed the town, and pursued the rebels for eight miles along the road to Calpee, capturing eight guns and a quantity of ammunition and stores. He had now been joined by the Seventy-First Highlanders, and continuing his advance reached the Jumna at Gowlowlee six miles below Calpee. The Commander-in-Chief had sent to co-operate with him Colonel Maxwell with the Eighty-Eighth Foot, some Sikhs and the Camel Corps, part of which crossed the river and joined Rose's force on the right bank. After four days of constant skirmishing Maxwell's batteries opened fire from the left bank on the fort and town, and Rose determined to strike the decisive blow on the 22nd. But the rebels anticipated him. On the morning of that day they came out in great masses to attack him. There was a critical moment when the thin British line momentarily yielded. But Sir Hugh brought up the Camel Corps, dismounted the men, and led them forward in person to the charge. The victory was won; Calpee was evacuated during the following night, and the rebel force, pursued by the horse-artillery and cavalry, lost formation and dispersed, losing all its guns and baggage. "This," writes Dr. Lowe,[9] "was a glorious success won over ten times our number under most trying circumstances. The position of Calpee; the numbers of the enemy, who came on with a resolution and display of tactics we had never before witnessed; the exhausted and weakened state of Sir Hugh Rose's force; the awful, suffocating hot wind and burning sun which the men had to endure all day without time to eat or drink; combined to render the achievement one of unsurpassed difficulty. Every soul engaged suffered more or less. Officers and men fainted away, or dropped down as if struck by lightning in the delirium of sunstroke. Yet all this was endured without a murmur, and in the cool of the evening we were speculating on the capture of Calpee on the morrow." The speculation was justified. Calpee was occupied, fifteen guns and several standards were taken; and Sir Hugh Rose, considering the campaign ended, issued a complimentary order to his troops and prepared to proceed to Bombay on sick certificate.