Oh boy, there was William Williams, right age, immigrant from England, working in a mine in southwest Idaho on the 1900 census.  But having chased Bill from England to Michigan then to South Dakota and eventually to Wardner, Idaho, how could I be sure this was the right one? The picture below was among family photos passed down to Ken Williams, a great grandson of Bill.  In fact there were two copies of the photo, a pretty good indication that there was a family member in it. Will the real Bill Williams please stand up?  That is, if the real Bill Williams is in this picture.  We'll probably never know which man is Bill but there is enough circumstantial evidence to place him in Owyhee County in 1900.  The clue--the photographer.  C. E. Joy had a photograph studio in Salt Lake City around 1900 and probably made trips to neighboring communities. Looking for the clues There are many clues for dating and identifying photos.  Prominent among those is resear...