The rediscovery of a unicum manuscript source of cantates françaises by Philippe II d'Orléans in the Württembergische Landesbibliothek, Stuttgart, provokes a re-evaluation of not only the provenance of the collection to which it belongs, but also the role played by diplomacy, sociability and cultural exchange in the history of the cantate française. The manuscript's contents all reflect Philippe's use of international connections to acquire music and engage musicians in the period 1701–1706. The manuscript forms part of a corpus of French scores that belonged to Marie-Thérèse de Lannoy de La Motterie, an aristocratic amateur harpsichordist with an interest in both French and Italian music, and in cantates. As wife of Joseph Lothar von Königsegg und Rothenfels, representative of the Austrian emperor to Philippe, then regent of France, she was engaged in the cultural life of Paris during the period 1717–1719, not only acquiring cantate prints but also a copy of Philippe's own works in the genre. Her collection reflects both her personal interests and her diplomatic cultivation of the social circles around Philippe in which music connoisseurship was an important skill. The manuscript thus highlights the important role played in the international transmission of cantates françaises by diplomatic and familial connections of noble amateurs, especially those curious about musical developments beyond their own regional practices.

The activities of eighteenth- and nineteenth-century music collectors help to chart the development of the period’s canon and understand the connections between consumers as amateur musicians and collectors and the composers and their music. In 2014, a collection of music came to light at the ancestral seat of the Earls of Bradford, Weston Park in Shropshire, which reveals a scenario of amateur music-making intrinsically linked to the wider professional scene. This collection has been largely ignored due to its unbound state in a private residence. It is of importance for its association with the five generations of the Bridgeman family, and for numerous manuscripts of previously unknown cello works; but crucially, the presence of four manuscript catalogues, a teacher’s bill for music, and an auction sale catalogue dating from the time, helps to fill in the gaps of what was being performed in the house, by whom, where, and when. This article describes seven sources connected with family music-making and presents a catalogue of the current music collection at Weston Park as supplementary material in the form of a data set in an Excel spreadsheet. Readers can consult the collection as it stands today and how it developed over 150 years.