In this short paper I try to present William James’s connection with the Argentinian writer Macedonio Fernández (1874-1952), who was in some sense a mentor of Borges and might be considered the missing link between Borges and James.

In this paper the relations between the almost unknown Spanish mathematician Ventura Reyes Prósper (1863-1922) with Charles S. Peirce and Christine Ladd-Franklin are described. Two brief papers from Reyes Prósper published in El Progreso Matemático 12 (20 December 1891), pp. 297-300, and 18 (15 June 1892) pp. 170-173 on Ladd-Franklin, and on Peirce and Mitchell, respectively, are translated for first time into English and included at the end of the paper.