Invoices bearing letterheads can often be found among boxes of ephemera at auctions, but rarely does one come across an invoice on which a letter has been appended, especially one signed by a famous Italian composer. But when that composer is also the part-owner of probably the most famous piano retailers in Georgian London, you’ve got something rather special.

Muzio Clementi (1752-1832) composed around 110 piano sonatas and was greatly admired by Beethoven. In 1798 he became a partner with Collard and Collard in a company that boasted the patronage of both the Royal Family and the East India Company. With a manufactory in Tottenham Court Road and a shop at 26, Cheapside, Clementi, Collard and Collard were for many years the best know musical instrument makers in London and as such were the go-to establishment for well heeled musical amateurs throughout the Empire.

This particular invoice, which was for 'An elegant new Piano Forte of 6 Octaves…with round corners on six legs', is  addressed to 'John F Halahan, MD, Assistant Surgeon, Royal Artillery, Montreal', and is dated August 17th 1824. It reveals that the full cost, with packing case included, came to 42 guineas, but this was reduced to £31 10s for cash. Additional expenses included freight charges of a mere £1 2s 6d and insurance at £1 11s 6d. Dr Halahan had already handed over 30 guineas cash as a down payment, leaving a balance of £14 6s 6d.