"Interpretations: Bricks were used to build walls around Pyu and Mon sites in Myanmar and Thailand during the early first millennium AD if not earlier. 1 Many of these bricks have lines on the ends or across the width, patterns made with the fingers while the bricks were still soft. Unlike many other diagnostic Pyu artefacts such as beads and coins, finger-marked bricks are not easily collected or traded. They are cumbersome to transport over great distances, and even when reused today tend to remain in the locality where they were first made. The massive brick walls of Sriksetra, Beikthano and Halin are one of the principal features used to identify these sites as Pyu, although it is now accepted that their occupation pre-dates the construction of walls. Chinese emissaries in the 9th century AD described the city-wall of the P?iao (Pyu) capital as being faced with glazed bricks, part of a general perception that walls designate an area as urban. It has been suggested that the armies of the Nan-chao did not think the newly founded kingdom of Bagan worthwhile to raid, as it had no fortified city (Htin Aung 1967:31)..."