When the British Crown revoked the Royal Niger Company's charter — effective 1 January 1900 — the headline number was the £865,000 cash payment authorised by the Royal Niger Company Act 1899. The clause that did not make the headlines was a separate deed entitling the Company, and its corporate successors, to half of every mineral royalty the colonial government would charge in a defined Northern zone (between the Niger River on the west and a Yola–Zinder line on the east) for 99 years from charter revocation. Chancellor of the Exchequer Sir Michael Hicks Beach laid out the terms on the floor of the Commons on 3 July 1899 (HC Deb vol. 73, cc. 1296–97): silver, tin, antimony, 'and the hope of gold.' In practice, the revenue stream was tin — the Jos Plateau became the world's fourth-largest tin producer by 1929 (see the North Central regional record for the community-side ledger).
The recipient was the Royal Niger Company → Niger Company Ltd (1900) → Lever Brothers (1920) → United Africa Company (1929) → Unilever (1930s), held through a dedicated subsidiary, Nigerian Properties, Limited. The royalty was paid throughout the colonial era. By 1942 — the only year for which Parliament debated a specific figure — Nigerian Properties received £228,000 in a single year (≈ £14.5 million / ₦29 billion in 2026 values, Bank of England CPI). The legal basis was confirmed on the floor of the House of Commons by Harold Macmillan, then Under-Secretary of State for the Colonies, in answer to a parliamentary question on 21 October 1942 (HC Deb vol. 383, cc. 1985–86). Across the 99-year window, the total ran into the tens of millions of pounds.
A separate 1899 obligation — Section 3 of the Act, requiring surplus revenues from the old RNC territories to be paid back to the British Exchequer — was quietly extinguished by the Nigeria (Remission of Payments) Act 1937 after the UK Public Accounts Committee found it administratively unworkable. The mineral royalty clause was not killed in 1937; it continued, as the 1942 Hansard debate proves five years later. Online references that conflate the two are wrong.
The clause survived Nigerian independence on 1 October 1960 without renegotiation; by operation of law, the obligation passed to the Government of the Federation. There is no Hansard or Federal Gazette record of a formal repudiation. It was overtaken, not repealed, by two acts of state ownership:
- The Petroleum Act 1969, s.1: 'The entire ownership and control of all petroleum in, under or upon any lands… shall be vested in the State' — extinguishing any private claim over oil rents. (Now itself repealed and re-enacted in the Petroleum Industry Act 2021.)
- The Land Use Act 1978, which vested all land (and sub-surface rights) in the state governor / federal government.
The 99 years ran out, finally, on 31 December 1998 — three weeks before the death of Sani Abacha's successor's transition. Nobody marked the day.
Was it a precursor to the Land Use Act? Structurally, yes. The 1899 settlement is the original assertion that Nigerian sub-soil belongs to the sovereign — not to whoever holds the surface lease, not to whoever discovered the deposit. The Crown took the rights from the RNC; the RNC kept only a royalty. Sixty-nine years later, the Petroleum Act 1969 made the same assertion in fully Nigerian sovereignty over oil. Nine years after that, the Land Use Act 1978 generalised the principle to all land. The unbroken line runs from the deed of 1 January 1900 to the Land Use Act's 'Lands vested in Governor' provision.
What we still don't know: the cumulative naira/sterling total paid to Nigerian Properties, Limited across 99 years; whether the independent Nigerian state actively continued payments after 1960 or simply let the obligation lapse de facto; the exact text of the supplementary deed (held at the UK National Archives, Kew, CO 446 / CO 583); and whether the 1969 Petroleum Act was understood at the time as extinguishing any residual NPL claim or whether NPL had already wound down. These are open archival questions.