When Mizu tries to reforge her broken sword the first time she adds it to the furnace with the iron ore where it was melted into the unsuccessful lump of steel which crumbled to dust. Yet when she built another furnace to try again she once again added the broken sword pieces (which had already been melted down in the previous furnace).
Fowler talks about the struggles of surviving the Irish famine with his sister, but in reality this event would not have occurred until at least 1845, over one hundred years later.