I remember reading a sci-fi short story where a man travels back in time and invests ten gold coins a few hundred years back. The name of the bank is Letta Goldini. I’ve forgotten everything but that about the story. Can someone please tell me what the story is and who it is by? I read it in a moth-eaten, falling-to-pieces collection about ten years ago, and for the life of me cannot remember anything except Letta Goldini.