Added entries to Trombone History Timeline from 2 new primary sources: 2 festival books from the British Library. The British Library has digitized 253 Renaissance festival books (printed accounts of special occasions, often kept by courts) and made them available online here. If you’re a history buff, this is an intriguing collection to browse! The documents are facsimiles of the original sources.
The specific relevant posts in the Trombone History Timeline are 1536 (the entry of Charles V into Siena, Italy) and 1641 (the entry into London of Charles I on his return from Scotland); both occasions include celebratory music by trombones.