The Newari Bronze Figures is the forty-sixth treasure that can be found in Uncharted 2: Among Thieves.
The Newari Bronze Figures is found in Chapter 13 - Locomotion. During the early-going through this section fraught with danger, you're going to want to hang off of the side of the train cars you encounter. More specifically, the train car with the two enemies that get killed by the horizontal metal bar is the train car you're looking for. You can hang, and then jump into the otherwise isolated train car. Within, you'll find plenty of crates and boxes, but what you're searching for is that telltale glimmer of a nearby treasure, tucked neatly in the corner of the train car you're currently occupying.