Why did three Tswana kings travel to London in 1895?

In 1895, a delegation of three Tswana kings traveled to London to successfully petition against a British plan to transfer the Bechuanaland Protectorate to the control of the British South Africa Company.123

By pleading their case directly to the British government, the kings effectively blocked the company from acquiring administrative and commercial rights over their territory, ensuring it remained under the British crown rather than becoming a private corporate holding. However, as a concession to secure this outcome, the kings were required to grant the company the right to construct a railway through their lands to Rhodesia.123