The Treaty of Perth (1266) records the agreement between Magnus IV of Norway and Alexander III of Scotland concerning the cession of the Isles (Mann and the Sodors) to Scottish sovereignty. The document details payment terms (100 marks annually plus 4,000 marks over four years), succession rights, treatment of inhabitants, and jurisdictional provisions. It includes both English and Latin versions and establishes the constitutional framework for Mann's transition from Norwegian to Scottish overlordship.

An administrative order issued by William, Earl of Salisbury and Lord of Man and the Isle of Wight, to his Treasurer in London, commanding payment of annual fees to various officers and counsellors retained for his service. The document is presented in both English and Norman French and provides insight into the administrative structure and financial arrangements of the lordship of Man in the late 14th century.

A formal grant document issued by William de Montagu, Earl of Salisbury and Lord of Man, granting a yearly rent of 40 pounds to William de Faryndon for life, payable from the issues of the Isle of Man. The document is presented in both English and Norman French versions, with witness signatures and heraldic seal description. It illustrates feudal administrative practice and revenue structures on the island in the 14th century.

A 14th-century Scottish royal grant by King Robert II of Scots, conveying one hundred librates of land in the Isle of Man as a marriage portion to Sir James Douglas upon his marriage to Agnes de Dunbar. The grant is witnessed through letters from George de Dunbar, Count of the Marches and lord of Mann, and represents a key record of Scottish sovereignty over Mann and feudal land transfer practices in the medieval period.

Papal bull issued by Pope Calistus III in 1458 establishing the Church of Sodor (Isle of Man) as suffragan to the Archbishop of York. The document records the appointment of Thomas as Bishop of Sodor following the death of Thomas Burton, and the formal ecclesiastical union. Provides crucial evidence of the Church's constitutional relationship to York and the island's ecclesiastical governance in the pre-Revestment period.

A formal indenture from October 1357 recording a convention between the King of England and King of Scotland, affirming truces and their terms of payment. The document explicitly mentions the Isle of Man as part of the territorial scope of the agreement, indicating early medieval English claims to Manx sovereignty. This is relevant to understanding the constitutional and political status of Mann before the Revestment.

A formal indenture recording a truce agreement made in London between England and Scotland, dated 8 May 1357. The document explicitly names the Isle of Man among territories under English royal faith and allegiance, alongside England, Scotland, Ireland, Gascony, Brittany, and Wales. This is significant for establishing the Isle of Man's constitutional status within the English realm in the 14th century.

A 14th-century royal charter (Rotuli Scotiae, 16 Ed. III) granting permission to the people of the Isle of Man to negotiate truces with Scotland and to engage in commerce with both enemies and allies, provided they do not supply arms or provisions to Scottish enemies. Presented in parallel English translation and original Latin. Relevant to long-term Manx autonomy, commercial privileges, and constitutional status.

A dual-language (English and Latin) royal writ from Edward III commanding his Justice of Ireland to investigate and prosecute Irish raiders who attacked Manx merchants and officials transporting ransom payment to Scotland. Documents early medieval Isle of Man's sovereignty, trading relationships, and vulnerability to maritime violence.

A royal letter of protection issued by King Edward III to the Bishop of Man (Thomas), granting safe passage and protection for the bishop, his men, servants, and goods while travelling to and from the papal court at Rome. The document is presented in both English translation and original Latin (from Rotuli Scotiæ), and demonstrates the bishop's status as a feudal vassal owing allegiance to the English crown while undertaking ecclesiastical business.

The Act of Settlement 1703 is a foundational Manx constitutional and property law document passed by Tynwald Court. It codifies the relationship between the Earl of Derby (Lord of Mann) and his tenants, establishing customary estates of inheritance, standardising fines on descent and alienation, and resolving long-standing disputes over tenancy terms. The act also addresses cottages, intacks, mortgages, and quarries. This document is central to understanding Manx landholding law, feudal relations, and governance structures before the 1765 Revestment.

A royal writ from King Edward III commanding the release of goods and chattels of the Bishop of Man, seized at the port of Lowestoft after a storm at sea. The Bishop was en route to Rome on ecclesiastical business. The document illustrates the status of Man under English allegiance and sovereignty, and the protection of Manx subjects' property rights in English ports.

A bilingual (Anglo-Norman French and Latin) royal writ from Edward III commanding Thomas de Drayton to transport the Bishop of Man from Scotland under arrest to London for examination. The document concerns the seizure of Scottish clerics and their goods at Carlisle, reflecting medieval jurisdictional tensions between England and Scotland over Isle of Man ecclesiastical authority.

A bilingual (Latin and English) royal charter in which King Edward III, with the consent of prelates, earls, barons and nobles, releases and quits all royal claims to the Isle of Man to William de Monte Acuto. This document is foundational to understanding pre-Revestment sovereignty questions and the historical trajectory of Manx governance from feudal tenure to parliamentary purchase.

Bilingual (Latin/English) transcription of passages from the Chronicle of Florence of Worcester covering early medieval and Norman-era references to the Isle of Man (Mevania). Includes accounts of Welsh rebellion (1094), Norwegian King Magnus's expedition (1098), and the island's political status. Relevant as historical background on pre-Revestment Manx sovereignty and the transition from Norse to Norman influence.

A bilingual (English and Latin) royal writ issued by Edward III commanding the seizure of the Island of Man into the Crown's demesne. The document appoints three officials (William le Taillour, Haver Macoter, and Gilbert Makstephan) to take possession and hold the island. This is a foundational document for understanding Crown claims to Manx sovereignty preceding the later feudal grants to the Derby and Atholl families.

Royal patent from Edward III appointing Edmund Mortayn, escheator of Ireland, and Brother John Tyrel to lead forces to recover the Isle of Man from Scottish occupation under Richard de Maundevill. The document reflects medieval military and administrative responses to threats to English sovereignty over the island, providing context for pre-Revestment Manx governance and English Crown interests.

A bilingual (English/Latin) record from Rymer's Foedera documenting the trial and imprisonment of Baron Henry de Bello Monte for refusing to counsel King Edward II on a truce with Robert de Bruce. The document details the king's council assembled at Bishopthorpe near York in May 1323, including the Archbishop of York, bishops, earls, and justices. Though geographically and temporally distant from 1765, this document exemplifies medieval constitutional procedures regarding counsel, counsel obligation, and baronial privilege — concepts relevant to understanding the later constitutional debates surrounding the Isle of Man Revestment and parliamentary sovereignty.

A twelfth-century charter by Reginald, King of the Islands and son of Godred, confirming grants of lands, liberties, and dignities to Furness Abbey in perpetuity. This document provides evidence of early medieval Manx sovereignty, ecclesiastical relationships with English monasteries, and the constitutional basis of Isle of Man governance. It is presented in both English translation and original Latin, edited from the Manx Society publications.

A trilingual (Latin, English, French) transcription of a 1414 treaty between England and France, notable for its enumeration of allied sovereignties and lordships. The document specifically mentions the Lord of Man and John Stanley as signatories/representatives for the Lordship of Man on behalf of England, and again references Man under French allies. This source is relevant to understanding the constitutional and feudal status of the Isle of Man in the medieval period, predating the 1765 Revestment by 351 years.

A formal legal opinion by Attorney General Charles Searle and Deemster Peter John Heywood on John Quayle's memorial claiming ancient privileges belonging to the Barony of St. Trinions. The opinion addresses feudal tenure, fealty obligations, and the distinction between services owed to the chief lord versus the crown following the 1765 Revestment. It establishes that fealty arising from the barony can only be owed to the Duke of Athol, not the King.

A petition from Duncan Mackoury to King Edward II and his Council, submitted c. 1314, requesting wardship and marriage rights of the heir of Nicholas de Ledewicke in Ireland as compensation for service to the Crown in Scotland and residence in Man. The document includes the original Anglo-Norman French text from the Parliamentary Rolls and the Council's response directing the Irish Exchequer to certify land values and heir details. Relevant to early Manx political history and the island's strategic importance during the Scottish wars.

An ecclesiastical mandate from John Sharp, Archbishop of York, dated 20 January 1697, formally installing Thomas Wilson as Bishop of Sodor and Man. The document includes the Latin original and English translation, with attestations of installation dated 11 April 1698. Relevant to understanding the Isle of Man's ecclesiastical governance and the formal procedures by which bishops were appointed and installed during the period leading up to the 1765 Revestment.

Royal charter by Robert I (Robert the Bruce) confirming the Island of Mann and the Calf Islands to Thomas Ranulph, Earl of Moravia, in fee and free royalty. The grant includes full administrative and judicial authority, with conditions of homage, provision of six ships annually, parliamentary attendance, and annual payment of 100 marks sterling at Pentecost. Presented in both English translation and original Latin, this document provides foundational evidence of Scottish sovereign claims to Mann prior to the later English acquisition.

A 1693 letter from William Sacheverell, Lieutenant Governor of the Isle of Man under the Earl of Derby, to the Archbishop of Canterbury detailing the poor condition of the Manx church, including a vacant bishopric, ruined churches, unpaid royal stipends, and impoverished clergy. The letter appeals for ecclesiastical and financial support to repair churches, fund clerical livings, and establish academic lodgings and a library.