
This extraordinary manuscript letter, entirely handwritten and signed by Raúl Castro Ruz from the Sierra Maestra on 4 February 1957, offers a rare contemporary glimpse into the formative months of the Cuban Revolution. Addressed to René Rodríguez Cruz, the Granma expeditionary later remembered as the "Primer Fidelista," the letter recalls the sacrifices and dangers endured during the revolutionary preparations in Mexico and pays tribute to Rodríguez's courage and steadfastness during the movement's earliest struggles. Of exceptional historical significance, Raúl affirms the rebels' determination to achieve "definitive victory under the leadership of Fidel," praising Fidel Castro's judgment and guidance at a time when the Revolution's survival remained uncertain and before his emergence onto the international stage through the Herbert Matthews interviews later that month. Written during one of the most precarious moments of the insurgency, this unpublished primary-source document preserves the voices and relationships of the Revolution's inner circle in real time. Linking Raúl Castro, Fidel Castro, and one of the original Granma expeditionaries, it stands as a remarkably intimate and historically important witness to the convictions, sacrifices, and personal bonds that shaped one of the defining political movements of the twentieth century.