H.M. the King in Betelu: hydrotherapy room, where they drink mineral-medicinal water
8th of August 1884 edition. Autographed page. "There are two abundant springs of mineral-medicinal waters in Betelu, [...] although they are very different owing to their chemical composition and the varied nature of their therapeutic indications: one of them is called Iturri-Santu or Holy Source, it is primitive sodium sulphurate...; the other [Dama-Iturri] is alkaline-bicarbonated-sodium-chlorurate ".
1 13 x 9 cm engraving on a 40 x 28 cm page
Establecimiento tipografico "Sucesores de Rivadeneyra", Madrid