Sobraon. In 1846, he was made commissioner along with P. A. Vans Agnew to demarcate boundaries. Letters were written to the Chinese and Tibetan officials by Lord Hardinge, but no officials joined. A second commission was set up in 1847 which was led by Cunningham to establish the Ladakh-Tibet boundary, which also included Henry Strachey and Thomas Thomson. Henry and his brother Richard Strachey had trespassed into Lake Mansarovar and Rakas Tal in 1846 and his brother Richard revisited in 1848 with botanist J. E. Winterbottom. The commission was set up to delimit the northern boundaries of the Empire after the First Anglo-Sikh War concluded with the Treaty of Amritsar, which ceded Kashmir as war indemnity expenses to the British. His early work Essay on the Aryan Order of Architecture (1848) arose from his visits to the temples in Kashmir and his travels in Ladakh during his tenure with the commission. He was also present at the battles of Chillianwala and Gujrat in 1848–49. In 1851, he explored the Buddhist monuments of Central India along with Lieutenant Maisey and wrote an account of these. In 1856 he was appointed chief engineer of Burma, which had just been annexed by Britain, for two years; and from 1858 served for three years in the same post in the North-Western Provinces. In both regions, he established public works departments. He was therefore absent from India during the Rebellion of 1857. He was appointed Colonel of the Royal Engineers in 1860. He retired on 30 June 1861, having attained the rank of Major General. Archaeology Cunningham had taken a keen interest in antiquities from early on in his career. Following the activities of Jean-Baptiste Ventura (general of Ranjit Singh)—who, inspired by the French explorers in Egypt, had excavated the bases of pillars to discover large stashes of Bactrian and Roman coins—excavations became a regular activity among British antiquarians. In 1834 he submitted to the Journal of the Asiatic Society of Bengal, an appendix to James Prinsep's article, on the relics in the Mankiala stupa. He had conducted excavations at Sarnath in 1837 along with Colonel F. C. Maisey and made careful drawings of the sculptures. In 1842 he excavated at Sankassa and at Sanchi in 1851. In 1854, he published The Bhilsa Topes, a piece of work which attempted to establish the history of Buddhism based on architectural evidence. By 1851, he also began