In reading The Cactus Throne, the Tragedy of Maximilian and Carlota, this man, Prince Felix Salm-Salm, shows up in the last days of the Mexican Empire to try unsuccessfully to help Maximilian out of his mess.
After spending time in America, he had married a girl from Vermont named Agnes Leclerq, a circus performer. Princess Agnes joined him on his trip to Mexico and they were involved in further adventures in America and Europe.
There was quite a bit of interesting information in the book about these two, but I just wondered if anyone knew anything else about this couple or had any pictures.