I've just noticed that the cover of Groves' book names the author as General Leslie M. Groves. His name was Leslie Richard Groves. I had always known of him as General Leslie R. Groves. I checked a photograph of his gravestone as well as every other document I could find related to him, and his middle initial is always R. Was this a printing error, or is there more to this story? Could anybody clear this up for me. Thanks.