Definition
The Lord High Treasurer was a high officer of the English Crown responsible for managing the royal revenues, overseeing customs duties, and administering the leasing of crown lands. The office ranked among the great offices of state and gave its holder substantial authority over the financial machinery of the English government. The position has not been filled by a single individual since 1714; its functions are now exercised collectively by the Lords Commissioners of the Treasury, a board whose formal existence underlies the modern institution of HM Treasury. In practice, the First Lord of the Treasury has become synonymous with the office of Prime Minister, while the Second Lord functions as Chancellor of the Exchequer — the effective head of government finance.
Why It Matters in Research
Researchers will encounter this office most often in pre-eighteenth-century English legal and constitutional materials. Primary sources referencing actions taken "by the Lord High Treasurer" or grants made "at the direction of the Treasurer" are uniformly historical and predate 1714. When reading statutes, letters patent, or crown leases from the Tudor and Stuart periods, the Lord High Treasurer appears as an operative legal actor whose authorizations carried formal legal weight — analogous in effect to a modern ministerial signature.
The transition to the Lords Commissioners is a trap for researchers working across the seventeenth and eighteenth centuries. Documents from after 1714 will reference the Treasury Commissioners rather than a single Treasurer, and the shift is not always explicit in the source text. A lease or revenue order using the older singular form in a post-1714 document may indicate the document is a copy, a formulaic recitation, or simply anachronistic drafting.
Researchers working in American colonial legal history should note that the Lord High Treasurer had jurisdiction over crown revenues extending to the colonies, and colonial land grants, quit-rents, and customs arrangements were connected to Treasury authority during this period. The office therefore appears not only in English constitutional sources but in colonial charters and proprietary grants.
Historical Dictionary Support
Black's Law Dictionary and Bouvier's Law Dictionary give essentially identical entries, both drawing on Mozley & Whitley's Law Dictionary as their source. Both confirm the two core functions — management of royal revenues and customs, and leasing of crown lands — and both note the transfer of functions to the Lords Commissioners of the Treasury. Neither source elaborates on the historical scope of the office, its relationship to Parliament, or the political significance of leaving it in commission.
The historical dictionaries are adequate for identifying the office in a source document but insufficient for understanding its constitutional weight. They describe what the officer did without conveying the degree to which control of crown revenues made the Treasurer one of the most powerful political figures of the medieval and early modern state. Researchers needing deeper treatment should look to constitutional histories of the English Exchequer and Treasury rather than relying on these dictionary entries alone.
Jurisdictional Note
This is an office of English and British constitutional law with no direct American counterpart. Its relevance to American legal research is historical and derivative — through colonial governance structures, crown grants, and the constitutional inheritance absorbed into early American public law.