Heat a little lard or some bacon drippings in a cast-iron skillet. Fry the ham slices for 5 or 6 minutes on each side, then place the slices on a serving platter. With a wooden spoon, scrape up the pan dredgings. Add the coffee, increase the heat, and simmer for 5 minutes. Season with pepper. Serve the gravy over the ham and biscuit halves.