If your wife is named Sylvia, then I probably have already sent all I know about both men.
Identifying people in old photos is problematic and maybe someone else has a good idea on this one. I included a photo of light brigade survivors standing with Buffalo Bill Cody in my book, but neither the curators at the museum which provided it nor other experts in the field could say for sure who the men were . . . I hazarded a couple of guesses based on other photos of survivors, but since then have come up with another couple of possible names (*all very unscientific and quite possibly wrong)