I'm surprised to read that Espee would use Anthracite coal for anything. It has to be sourced from N.E. Pennsylvania, and it burns really HOT, so much so that special stoves and boilers were required with extra material in them to prevent the bottom from burning through. Also, if one was starting an Anthracite fire in a cold stove, a wood fire was usually required first to get the coal to burn. It did burn clean, with little soot or ash, big advantages in home heating.