This group of notebooks contains details of the excavations of graves 1 to 283 at El Oficio. They were written by Pedro Flores between 4 May 1886 and 28 September 1888 (approximately).
As in the previous journal groups, the working method of each notebook is always the same: location of the tomb, description of its structure and grave goods, approximate number of interred individuals and, in most cases, a schematic plan with the location of the pieces.