Venters sees Oldring and the Masked Rider ride across the edge of Jane's land. Why is this ominous? What do the people know about Oldring?

When Venters sees Oldring and the Masked Rider ride across the edge of Jane's land, it is ominous because Oldring is known as a dishonest cattle rustler. This gives the reader a sense of anticipation knowing that Oldring and his Masked Rider may be out causing trouble and are clearly going somewhere.