When I got the ChipGuide, after Greg Susong passed, he only noted contributions from others, not his own. It is possible that he used images from others without noting the source, maybe at their request to be anonymous. At a certain point we decided to attribute all images from the original ChipGuide to Greg, if they were not attributed to someone else. Long and short ... not all images attributed to Greg may have been in Greg's collection. But we have no way of knowing otherwise.