LSE4332129 The tapial, an ancient technique of building clay walls using a wooden formwork, compact by jam and dry by the sun, engraving by Riou, to illustrate the story L\'Amerique equinoxiale, by E.Andre, traveller in charge of mission by the French government, in 1875-1876, published in the tour du monde, under the direction of Edouard Charton , 1879, Paris. Selva Collection. by Riou, Edouard (1833-1900); Private Collection; (add.info.: The tapial, an ancient technique of building clay walls using a wooden formwork, compact by jam and dry by the sun, engraving by Riou, to illustrate the story L\'Amerique equinoxiale, by E.Andre, traveller in charge of mission by the French government, in 1875-1876, published in the tour du monde, under the direction of Edouard Charton , 1879, Paris. Selva Collection.); Photo by Leonard de Selva.