Further evolution of the state emerged from conflicts between British and Dutch colonists leaving the Cape Colony following its seizure from the French-allied Dutch by the British in 1795, and also from the Orange River Sovereignty and subsequent Orange Free State. Missionaries Thomas Arbousset, Eugène Casalis and Constant Gosselin from the Paris Evangelical Missionary Society, invited by Moshoeshoe I, were placed at Morija, developing Sesotho orthography and printed works in the Sesotho language between 1837 and 1855. Casalis, acting as translator and providing advice on foreign affairs, helped set up diplomatic channels and acquire guns for use against the encroaching Europeans and the Griqua people.