Welcome to the Forum, MrsT1904.
You are probably referring to images posted some time ago. Unfortunately the Forum was hacked several years ago and in the process all images were lost. Many of these have been replaced by the original posters but by no means all. If the original poster remains an active member there is always the chance that he/she will replace particular pictures at some stage in the future, especially if there is a specific request for them. If however their membership has lapsed or they are no longer active, then we have to accept that in most instances the images are lost to us.
(For more recent images which appear as a thumbnail a simple clicking on them will of course expand them for viewing).
Chris
PS There you are, two responses from Admin for the price of one! (Sorry, they overlapped).