Horno - a mud adobe-built outdoor oven used by Native Americans and early settlers of North America. Originally introduced to the Iberian Peninsula by the Moors, it was quickly adopted and carried to all Spanish-occupied lands. Quite common in the rural areas of Argentina (this example) and Uruguay, from colonial times to the present day, and it is called horno de barro ("mud oven"). On the reverse of this card is the line "Oven in the camp for making bread etc. etc." !