Are you sure you never noted or wrote down the website address you found it on?
Could have been on one of several early family or group sites that have been shut down or changed software and is "lost" or need to be a registered to access.
After 2003, maybe 5 years ago USGenWeb.org made some changes that made allot of links to other pages "lost". Also several group type websites like GeoCities etc quit working where lots of early internet genealogy searchers posted family research and pictures.
There are several online trees at Ancestry but none have any photos.
Try to find a website for his unit:
NEY, CURTIS, J.
21st Regiment, Co. M (buried:Shamokin Cemetery, Shamokin, PA)