In 1958 and 1959 in conjunction with the execution of the Huanghe River (Yellow River) Water Conservancy Project, an investigation of paleolithic stone artifacts was conducted along the Huanghe River, from Togtoh County of the Nei Monggol (Inner Mongolian) Autonomous Region in the north to Pianguan County, Shanxi Province in the south, with Lamawan in Qingshuihe County as the center.

There were five other fatalities on conveyor faces, involving two fillers, a chargeman,- stoneman, and a coalcutterman.

Examples of rituals include touching wood, repeating phrases in your mind, wearing lucky clothes or jewellery, and avoiding unlucky numbers, out of a faulty belief that these rituals will stop unfortunate or tragic events befalling yourself or your loved ones.

Entire vills sir Henry Spelman conjectures to have consisted of ten freemen, or frank-pledges.