1. Dagnall H . Creating a Good Impression: Three Hundred Years of The Stamp Office and Stamp Duties. HMSO, 1997.
2. Medicines legislation and regulation in the United Kingdom 1500‐2020
3. “A Gentleman of the Inner Temple”. A Concise Abstract of the Most Important Clauses in the Following Interesting Acts of Parliament, Passed in the Session of 1785 ... London: J Walker, 1785.
4. Anno regni Georgii III ... vicesimo quinto [Cap. LXXIX. An Act for repealing an Act [of 1783] ... for granting to his Majesty a stamp-duty on licences to be taken out by certain persons uttering or vending medicines; and certain stamp-duties on all medicines sold under such licences, or under the authority of His Majesty's Letters Patent; and for granting other duties in lieu thereof.]. https://wellcomecollection.org/works/zgdkjrgy.
5. Tomlins TE (editor). The Statutes of the Kingdom of Great Britain and Ireland. Volume the First. London: George Eyre and Andrew Strahan, 1804: 375-85.