My friend, the anthropologist Jill Vexler, was invited to create a photographic essay for a museum on the Day of the Dead in Mexico. I accompanied her to a Nawatl village, Chachajuantla, high in the rocky mountains of Chihuahua. We drove over rocks that I was sure would defy us but she had done her field work here and somehow managed to find the way, roadless and in the middle of the night. A dog, or perhaps a wolf came into the car's lights, seeming to lead us. I have seen this animal guide before, notably on my trips with my husband to a country house we had in upstate New york, but never so clearly.