This article discusses the available sources of information on the value and volume of Peru's exports and estimates the current value of exports, the index of export prices and the quantum of exports using a wide variety of sources. By relying on several sources, I estimate the first complete series of the current value of exports for Peru for 1830-1930. Importantly, I adjust other studies' estimates by taking into account the deficiencies of foreign sources and by distinguishing between exports of specie and of minerals. The estimations show that exports experienced substantial growth in the 1850s and 1860s, during the Guano Era. Exports stagnated in the 1870s and dropped during the War of the Pacific (1879-1883) before recovering in the late 19 th and early 20 th centuries, especially during World War I.