Everett Wilkie passes along two articles from Spain's El Pais (one from Tuesday, one from today) regarding the map thefts from Madrid's Biblioteca Nacional reported back in early September. The articles are in Spanish, but I've found condensed English versions here and here.
Tuesday's piece reveals that one of the stolen maps (from a 1482 edition of Ptolemy's Cosmographia) was recovered by the FBI in New York after it was found to be in the possession of a collector. "The identity of the collectioner [sic] was not given. It was not known whether he or she was aware that the map, which is valued at about 100,000 euros (140,000 dollars), was stolen."
Police now believe that twelve pages of maps and documents were removed from the National Library by an Uruguayan man living in Argentina, who registered with the library as a historian using the name César Ovilio Gómez Rivero (may not be his real name).
And from Australia, news that police have recovered two additional maps from the same 1482 text, these "found in Sydney at the home of an Australian antiques dealer who had bought them at an auction in London. ... The names of the Australian dealer and the London auction house were not revealed."
More as I find it.