I've been in touch with pbase and they confirm that posting the source code is unreliable because it accesses their server and that images can move around from server to server. That explains the problem. Based on their suggestion, here is another try. If this shows up it will be because the jpg suffix was left out of the original attempt. Someone had, in fact, made that suggestion, and I seemed to have ignored it. Here goes.
Again, I apologize for all the blather.
Harry