Chief among these studies, is the two-volume work: Relación Histórica de La Florida escrita en el Siglo XVII, published in Madrid in the early 1930's. This publication, edited by Fr. Atanasio López, O.F.M., is a reprinting, with notes and supplementary material, of a work first published within the first quarter-century following the slaying of the Five Martyrs of 1597: Relación de los Mártires que a avido en las Provincias de La Florida.

The author of the original Relacion was Fray Luis Jerónimo de Oré, O.F.M. (1554-1630), in his day a well-known figure in his native Peru and in Florida, as well as in Rome and Spain. First printed shortly after 1618, Oré's Relación was lost sight of for many years, when only a few copies were known to exist. Father Atanasio López, however, rescued it from this undeserved and unfortunate oblivion by.his re-edition of 1931, enriching it with a 5O-page Introduction. In 1933, a complementary volume was published, consisting of subsidiary documents to illustrate the original work.³