Place bread in a single layer in a 13x9-inch glass baking dish. Blend together eggs, half and half, sugar, orange juice, vanilla, nutmeg and salt. Pour over bread, turning bread once to coat evenly. Refrigerate, covered, overnight. In the morning, preheat oven to 400 degrees. Place 1/3 C. butter in a 15x10-inch jelly roll pan. Place pan in the oven to melt butter. Remove pan from oven and tilt to coat pan evenly with butter. Remove bread pan from refrigerator. Arrange soaked bread in a single layer on the jelly roll pan. Sprinkle the brown sugar and nuts on just before baking. Bake, uncovered, for 25 minutes or until firm and golden brown.