Re "Dead Cow Canyon", I never saw that in print, only heard it from locals, e.g. Mike Larinan. I have since seen reference to a “Dead Horse Canyon” in an article about Pico Canyon in Leon Worden’s Old Town Newhall Gazette. Potrero Canyon led to an oil lease, owned by Barnsdall when we arrived, then by Sunray. The home of the Borden family was on that lease."