Here is a card I own from the Herpolsheimer cards on ebay that I own...
Unknown pose of Henry that was not produced elsewhere showed up in that collection then just recently a card with the same image was found with... Holsum Type 2 back (a set that parallels the Herpolsheimer and Standard Biscuit D350-3 set). That would be some serious forethought on the part of the fake card maker to use an unknown image only to have one eventually be found that was authentic (but only after the Herpolsheimer's came to light).
http://catalog.scpauctions.com/1921-...-LOT28455.aspx