After Lassiter leaves Surprise Valley, what is Venters worried about? Why is he worried? What actions will he take at this point?

After Lassiter leaves Surprise Valley, Venters is worried because he now knows that someone can track him into the valley and he and Bess are not longer safe. At this point, he decides they must leave the valley and Bess shows him the gold, so they have the money to travel across the country.