Valck’s report of European torture in Deli was wholly erased

Evidence

I sought for some eighteen years to find what became of him since first reading his arresting letter to his friend Norman Levyssohn, along with his explicit official reports of European barbarisms on the Deli estates, which cost him his job. But enjoying neither success nor fame,Valck’s scent was faint, his imprint gone, his account of torture wholly erased. — Ann Laura Stoler, Along the Archival Grain_ Epistemic…, 1297

Categorization

• QUESTION: What exactly did Valck report about Deli estate tortures, and how did the report cost him his job before being erased? Chapter presumably fills this in.