Part A: Explore the clues

How have migrants been treated in Australia?

Your next question is: How have migrants been treated in Australia?  What clues can you find in the following six sources?

Source A: This is a report from a police investigation in 1901 following a complaint raised by a member of parliament.  Who do you think may have been responsible for the 'reports and rumours' about people from Afghanistan?

Reports and rumours of Afghans polluting the water and taking forcible possession of dams have been received by the police on various occasions, but, on enquiry, no evidence was obtainable to lookup failed
SELECT * FROM glossary WHERE phrase = 'substantiate'