i purchased this painting recently and on the back is written 'natural bridge 1858 virginia' in handwriting which appears to be identical to frederic edwin church's. i was puzzled because it doesn't look at all like the natural bridge in virginia. i then came across a photo of arch rock and it is a deadringer! i hope someone can shed some light on it. it is certainly a gorgeous old painting of the arch. please help me find some info about it.