Here’s something I came across on the website of the Morgan Library:

This is the only surviving personal notebook of the French artist Édouard Manet (1832–1883). He used it in the early 1860s, when he was between the ages of twenty-eight and thirty, documenting aspects of his everyday life and work in the two years leading up to his most significant contributions to modern painting, Le Déjeuner sur l’herbe and Olympia….

The notebook is small (10.9 x 14.1 cm), bound with a leather spine and embossed paper-covered boards, and heavily worn from frequent use. The inside front cover bears a label of the stationer J. Mèche, located at 189 rue Saint-Honoré, across from the Church of Saint-Roch, just steps from the Tuileries Gardens. Manet filled about 38 of the notebook’s 102 pages, leaving many blank….

Read more at the website of the Morgan Library: Édouard Manet’s Notebook, 1860–62