Jane Stirling worked with Chopin in assembling seven bound volumes of the French editions of most of his works, and in compiling a thematic index. These volumes were later used by the French musicologist and Chopin biographer to establish the Oxford original edition of Chopin. However, whether Chopin intended this collection to serve as a basis for a revised collected edition of his music is an open question. She also became his secretary, agent and business manager. She arranged his concert at the Salle Pleyel on 16 February 1848, and also attended to the heating, the ventilation, and the flowers. The concluding item of the concert was the Barcarolle in F-sharp major, but Chopin was too exhausted to complete the final section. After managing to walk unaided to his dressing room, he collapsed in Jane Stirling's arms. This was to prove his final Paris concert. There had been plans for another concert there in March, but on 23 February a revolution broke out, many people fled the city, and Chopin was suddenly deprived of his livelihood.