A little, unpublished red-chalk drawing, formerly
belonging to the art historian Mario Salmi, is
presented in this paper. It represents a nude soldier on a rearing horse,
beating a flow to an enemy of which we can see only a very slight sketch. Salmi himself attributed, by his own hand, the sheet to
Raphael, and this attribution seems very likely, by comparisons with other
autograph drawings in Vienna, Budapest, Windsor and Bayonne. The chronology seems about 1510 or very
little later; here is presented the hypothesis that the sheet could be a first
idea for the Eliodorus in the Vatican.