Doing a rejig of this website yesterday, I came across this pic, on a blog about enamel miniatures (thank you to Don Shelton; link to his site on the 'About Us' page). So I suppose I've also been thinking about the eighteen sixties. There's a novelist called Jack Finney, author of The Body Snatchers (you must have seen one of the films) and also Time and Again (sequel: From Time to Time) which deals with this recurring theme of interfering with the past. Maybe I could go back and discuss it with him.