 According to historian Luciano <unk> , the preparation of pisco with lemon dates as far back as the 18th century . He bases his claim on a source found in the Mercurio <unk> which details the prohibition of aguardiente in Lima 's Plaza de toros de Acho , the oldest bullring in the Americas . At this time , the drink was named <unk> ( Punch ) , and was sold by slaves . <unk> further argues this drink served as the predecessor of the Californian Pisco punch , invented by Duncan Nicol in the Bank Exchange Bar of San Francisco , California . A recipe for a pisco @-@ based punch , including egg whites , was found by researcher Nico Vera in the 1903 Peruvian cookbook Manual de <unk> a la <unk> ; consequently , culinary expert Duggan McDonnell considers that " [ i ] t is entirely possible that the ' Cocktail ' that came to be the pisco sour [ ... ] had been prepared for a reasonable time in Lima before being included in a cookbook . " 
