As far as I know, Isaac never left this country but I have copies of correspondence written to him 1859 from Garibaldi, Louis Blanc and Victor Hugo discussing Mazzini and Lajos Kossuth, revolutionary leaders in Italy and Hungary, respectively. Maybe someone gave him a coat? I have been going through my information again and the obvious has struck me. If the original photo was taken 1862 (as written on the back of this second copy), that was the year that Isaac's father, Robert Crowther, died. Could this be a photo of Isaac in mourning outfit?
regards
Peter Crowther