While he was a prolific writer, known for his detailed descriptions and observations, he never kept a personal diary. He did, however, keep extensive journals and notebooks filled with ideas, drafts, and personal observations.
These journals are valuable resources for scholars studying Dickens' life and work, but they are not in the same vein as a personal diary. They offer insights into his creative process, his social circle, and his thoughts on various subjects, but they don't delve into the deeply personal details that a diary would contain.