Thomás O'Ryan y Vázquez

He also fought in Cuba, aged around 30, participating in the defeat of the second attempt at maritime invasion by the Venezuelan filibuster Narciso López (1797 – executed 1851), who had been helped with exiles, mercenaries and money by United States Governor John A. Quitman of Mississippi (1797–1858), former Senator John Henderson of Mississippi (1797–1857) and the editor of the New Orleans Delta, Laurence Sigur, contravening the Spain–USA neutrality conventions operative since 1818.

They wrote a most interesting account of the Crimean War in 3 volumes, namely: Memorias sobre el viaje militar a La Crimea, presentada por los oficiales del Cuerpo de Ingenieros nombrados en 1855 para seguir y estudiar las operaciones de la Guerra entre Rusia y las potencias occidentales de Francia e Inglaterra auxiliando a la Turquía.

Madrid, Imprenta Memorial Engineers (Reports on the military journey to the Crimea, by officers of the Corps of Engineers appointed in 1855 to monitor and study the operations of the War between Russia and the Western powers France and England, in support of Turkey.).

Conferencias dadas en el Centro del Ejército y de la Armada by General Don Tomás O´Ryan y Vázquez (East War (1854 to 1856).

11, of the Imprenta Memorial Engineers, (Madrid), a 360 pages treatise with 36 deployable designs, a translation of the German work by the Austrian Julius von Wurmb Tratado de Arquitectura Militar (Treatise on Military Architecture).