 Larger communities like Parnngurr, consist of smaller "hearth groups", collections of individuals with familial connections that coreside in camps around shelters supplied by the government.During cold months, when these groups start living within the shelters, sleeping spaces are divvied based on age and kinship, but elders usually maintain the whole residence.The creation of the Canning Stock Route in 1906–07 was a brutal time for many people of Martu groups, who were forced to serve as guides and reveal water sources after being "run down" by men on horseback, restrained by heavy chains and tied to trees at night.