The LuEsther T. Mertz Library digitized and added Albert Frederick Calvert’s Granada and the Alhambra (London: J. Lane, 1907) to the Biodiversity Heritage Library several years ago. (The New York Botanical Garden’s Mertz Library is a contributing member to the BHL consortium.) Feel free to flip through the book.
It might make you want to visit in person NYBG’s Spanish Paradise: Gardens of the Alhambra exhibit, which runs through August 21, 2011. If you do, be sure to visit the Library as well. Its Historical Views: Tourists at the Alhambra is currently on view in the William D. Rondina and Giovanni LoFaro Gallery.