Conversation so far:
What treaties did Cecil Rhodes have?
Rudd Concession
what did the Rudd Concession say?
written concession for exclusive mining rights in Matabeleland, Mashonaland and other adjoining territories in what is today Zimbabwe
did the Rudd Concession say anything else besides exclusive mining rights?
Furthermore, it stated that the mining companies could do anything necessary to their operations.
What happened after the Rudd Concession?
During the Company's early days, Rhodes and his associates set themselves up to make millions (hundreds of millions in current pounds) over the coming years
How did Cecil Rhodes and his associates set themselves up to make millions over the coming years?
through what has been described as a suppressio veri ... which must be regarded as one of Rhodes's least creditable actions“
What does suppressio veri mean?
“a pressing down of reality” ≈ “suppression of the truth”

Question: So then what happened
Self-contained rewrite: So then what happened during Cecil Rhodes's supressio veri actions?