Since sole uses of many Prexies are very easy to find, for the purpose of this census, only solo uses that are more difficult to find are tracked. We ask that Prexie collectors and other postal historians review the information and provide updates where possible. Updates should be sent to Richard Pederson, at rich@pedersonstamps.com, along with a high resolution scan (300 bpi) of the item so it can be included in the census and posted on the site. If you are the current owner and would like the item attributed to you, please say so. If you do not want the item posted, but included in the census, it will still be necessary to see a scan/picture of the item to be certain that it has not already been counted (e.g., from information passed by a previous owner).