Photographs when sent through the communication line either by mail or through the Comm Centre must always be routed either in boxes for such or between two sturdy pieces of cardboard which will not bend.
NEVER put a paper clip on any photograph, either to keep several together or to attach dispatches to. JUST NEVER PUT A PAPER CLIP ON ANY PHOTOGRAPH FOR WHATEVER REASON!
The reason for such protection of photographs is simple. If any photograph has the least bend or break in it, it cannot be used for photolithograph reproduction in magazines or printed matter as the bend or break causes a white streak to appear in the reproduction which cannot be corrected or used.