The article addresses the unpublished letters sent by the Chilean writer Flora Abasolo to the Basque philosopher Miguel de Unamuno. First, it accounts for the literary production of the writer, given the evident ignorance that exists of her within the national intellectual scope. Then, it makes reference to the letters as they are part of the communication and editorial initiative undertaken by Flora in favor of the recognition of her father's name, the philosopher Jenaro Abasolo, and of his posthumous work, The Political Personality and the America of the Future (1907). Accordingly, the context of the letters is made explicit: their dates, number and purpose; and a critical hermeneutics of part of their content is carried out with the aim of incorporating new biographical and literary backgrounds of the writer and her progenitor. It inquires, in turn, the reasons that Unamuno could have had to leave unfulfilled the commitment to review Abasolo's work, heeding the circumstances, the strategies followed by Flora and her frame of mind, different from her father's in the search for recognition. This work is part of a larger research that we have been developing since 2008 on Abasolo. We add the letters to this task as a new document that surpasses the expectations regarding the value that they have for the reconstruction of the life and work of the philosopher from Santiago, and for the evaluation that can be done of the Chilean writer herself. We emphasize, therefore, the convenience of incorporating to the investigations of the philosophy in Chile this class of documents that avoid, beyond its initial inconsequential appearance, to travel paths that must be retraced when the weight of the documentary evidence turns erroneous a part of what speculation had established without background.