A lot has been said about “secret” signs, which Bedouins used to recognize and evaluate the purity of a horse. Rszewuski mentioned them, claiming that he possessed an empirical knowledge of these signs, shared by his Bedouin friends. Nothing about these was found in his personal archives after his death. Was he boasting ? Is this all a matter of tradition and superstition without any scientific basis? Or do we have lost an irreplaceable treasure thousands years old? Can we find and collect some of this knowledge, if not all of it , and use it to select and improve the asil Arabian and perhaps other horse breeds ? There is very little I can bring to that topic, and most of it is about the sloughi, the North African sighthound. A lot of signs exist in this breed, constituting a real and valid standard. For example, the prominent occipital bulge, the terminal ring of the tail, the marks on the metatarsal bones, the amount of fur in some places of the face … Some of these signs are very useful clues aboupt stamina, speed and the general quality of the sighthound. Back to horses, I met a renowned horseman in…