Mix flour, bread crumbs, water, molasses, figs, raisins, walnuts, orange peel, baking soda, cinnamon, cloves, allspice, and nutmeg together in a bowl until batter is well incorporated; spoon batter into the prepared double-boiler bowl and cover.
Fill the bottom half of a double boiler with water and bring to a boil; reduce heat and simmer. Place bowl in the simmering water and cover. Steam until pudding is cooked through, adding water as needed, 3 hours. Cool slightly with cover ajar before serving warm.