LSE4329639 An Indigo factory near Allahabad, engraving after E. Therond illustrating the journey of 184-68 by Louis Rousselet, published in Le Tour du Monde, 1874 by Therond, Emile Theodore (b.1821); Private Collection; (add.info.: A factorery near Allahabad, in which the indigofere plant is treated to be dyed, in the large stone troughs the plant ferments in the sun, then after evaporation, forms a deposit of pure indigo, which will be dried, packaged and sent off, engraving after the drawing of E. Therond, illustrating the journey in India des Rajahs, in 1864-1868, by Louis Rousselet, published in ???e tour du monde??????1874, edited by Edouard Charton, edition Hachette, Paris. Selva Collection.); Photo by Leonard de Selva.