'Ymchwildaith i'r Andes', being Llwyd ap Iwan's journal of a journey to the Andes, 1888, together with measurements relating to 'Camlas y Gaiman' and other water channels in Patagonia.
The Welsh Inscription on the monument to Christopher Columbus unveiled on May 5, 1893 (it is said to be the first in the whole of South America). The four sides of its pedestal carry inscriptions alluding to Columbus in Italian, Welsh, English and Castilian Spanish.