Madurell Marimón 1951/II: 2; Ferdinand of Antequera orders his treasurer, Fernando de la Cavalleria to pay 43 Aragonese gold florins to the organist Pisa ('sonador dels orguens de nostra capella') for an organ he has made for the royal chapel and its cover ('los quals nos li manam donar per rao de uns orguens los quals nos havem manat esser fets per servir e us de la dita capella, e per un cuberta als dits orguens').