One of the jaguars referred to by Vernon Bailey in his "Biological Survey of Texas" was reported killed on the Like Oak Peninsula in 1858.
Wild Texas History
A jaguar account from 1847 about an encounter on the Bernard River in Brazoria County.
When Col. H.L. Kinney founded Corpus Christi in 1839, he named some of the first city streets after wildlife native to the area.
This except from an 1886 article puts ocelots, bison and longhorns in east central Texas in the early 19th century.