“LET ME SHOW YOU SOME OF my favorite things,” says Bill Green.
It’s just before 10 on a chilly October morning, and we’re standing in the entryway to the Panhandle-Plains Historical Museum in Canyon, 19 miles south of Amarillo. Outside, on the campus of West Texas A&M University, students hurry to class in a persistent drizzle. Inside, museum employees are arriving, and several stop to say hello to Green, who was the history curator here from 1993 to 2010 and still wears his staff name tag. Now 75, he walks slowly and speaks quietly, but there’s an intensity to his piercing hazel eyes, which quickly scan whichever artifact or person he’s studying. Green, who has a neatly trimmed white mustache and wears suspenders over a plaid shirt, still works as…