the time, no antibiotic had been identified to treat the disease, and this exacerbated the impact of the illness. Streptomycin, the first effective treatment, was not introduced until 1943. In 1920 and 1922, Regina physician F.A. Corbett was commissioned to visit the schools in the west of the country, and found similar results to those reported by Bryce. At the Ermineskin school in Hobbema, Alberta, he found that 50 percent of the children had tuberculosis. At Sarcee Boarding School near Calgary, he noted that all 33 students were "much below even a passable standard of health" and but four were infected with tuberculosis". In one classroom, he found 16 ill children, many near death, who were being forced to sit through lessons. In 2011, reflecting on the TRC's research, Justice Murray Sinclair told The Toronto Star: "Missing children – that is the big surprise for me ... That such large numbers of children died at the schools. That the information of their deaths was not communicated back to their families." Missing children and unmarked graves The Truth and Reconciliation Commission wrote that the policy of Indian Affairs was to refuse to return the bodies of children home due to the associated expense, and to instead require the schools to bear the cost of burials. The TRC concluded that it may be impossible to ever identify the number of deaths or missing children, in part because of the practice of burying students in unmarked graves. The work is further complicated by a pattern of poor record keeping by school and government officials, who neglected to keep reliable numbers about the number of children who died or where they were buried. While most schools had cemeteries on site, their location and extent remain difficult to determine as cemeteries that were originally marked were found to have been later razed, intentionally hidden or built over. The fourth volume of the TRC's final report, dedicated to missing children and unmarked burials, was developed after the original TRC members realized, in 2007, that the issue required its own working group. In 2009, the TRC requested $1.5million in extra funding from the federal government to complete this work, but was denied. The researchers concluded, after searching land near schools using satellite imagery and maps, that, "for the most part, the cemeteries that the Commission documented are abandoned, disused, and vulnerable to accidental disturbance". In May 2021,