saysthatearlyinthiscenturytheywereoftenkilledbytravellers，whotetheredtheirhorsestothecarcassestopreventthemfromstrayingatnight。
FromCorpusChristiJuandeAyolaswassentouttoexploretheriver，andtrytofindthelong
sought
forwaterwaytothePeruvianmines。
HeneverreachedPeru，andCorpusChristineversawhimreturn。