Kableshkov was a young organiser from Koprivshtitsa. His letter connected action in different towns: other participants needed to learn quickly that the uprising had begun. The name “Bloody Letter” belongs to a particular message and its memory, rather than every letter written during the uprising. Helped prepare the April Uprising. Acted in Koprivshtitsa in 1876. Sent news to the insurgents in Panagyurishte. The letter shows why communication and timing mattered in a shared uprising.