Valverde’s Derrotero | Guide to the Inca Treasure?

Is the copy of the Cedula Real found and translated by Richard Spruce authentic and accurate? The transcript of the document was added by Álfred Russel Wallace in ‘Notes of a botanist on the Amazon and the Andes… during the years 1849-1864. Only the first part of the first volume has been written by Spruce. [...]