Barr, Robert: One Day's Courtship. V1. 6 Nov 2010
 

Robert Barr (September 16, 1849 – October 21, 1912) was a British-Canadian short story writer and novelist, born at Glasgow, Scotland. Robert Barr, a teacher, journalist, editor and novelist, born in Glasgow, Scotland and educated in Canada. In 1876 he became a member of the staff of the Detroit Free Press, in which his contributions appeared under the signature "Luke Sharp." In 1881 he removed to London, to establish the weekly English edition of the Free Press, and in 1892 he joined Jerome K Jerome in founding the Idler magazine, from whose co-editorship he retired in 1895. He was a prolific author, producing many popular novels of the day.

Excerpt
Those pictures, Miss Sommerton, are not genuine; they are not at all what they pretend to be. The prints that you have seen are the results of the manipulation of two separate plates, one of the plates containing the group or the person photographed, and the other an instantaneous picture of the falls. If you look closely at one of those pictures you will see a little halo of light or dark around the person photographed. That, to an experienced photographer, shows the double printing. In fact, it is double dealing all round. The deluded victim of the camera imagines that the pictures he gets of the falls, with himself in the foreground, is really a picture of the falls taken at the time he is being photographed.