Photos in iPhoto cannot be found in the Library Folder on the desktop

Question

I have a perplexing problem with iPhoto 6. A couple of months ago, I started a new Library and renamed it Current iPhoto Library placing it on the Desktop (rather than in the Pictures Folder).
I did this because my laptop became too full and I ran out of hard disk space. The original Library resides on an external hard disk.
I added many new photos to the new Library, inside of new albums.
My problem is that all the new photos seem detached from the Library Folder on the desktop.
They do take up memory, and now my laptop hard disk is full again.
But I cannot free up space because the Library folder does not recognize the existence of the new photos—even though while in iPhoto, with the program is running, I have no trouble accessing all the photos.
I tried DiskWarrior, assuming that there was a Directory malfunction. That did not help.
I tried rebuilding the Library using iPhoto's built-in capability, by starting the program while pressing the Command and Option keys. No help.
How can I make the Library Folder recognize all the photos that iPhoto can see fine within the program?

Answer 1

First, thank you for keeping up with me.
Second, where do look for Folder? On the desktop? iPhoto?
Third, in replaying what must have happened, I think I have an idea of what went wrong. Originally, I moved my first Library to an external HD to free up space on my laptop, and I started a new Library. Some time ago, iPhoto must have spontaneously created a new third Library. It left what I am calling the second Library as the only visible folder containing an iPhoto Library. I was able to mount the small second Library when I restarted iPhoto by pressing Option and selecting the only Library that was visible to me. When I did that, unfortunately iPhoto disengaged from the huge third Library it had created. All along the third Library was invisible on the desktop as a folder--which is why I got into trouble. I ran out of space again and wanted to move the contents of what I now realize was a third Library to another external HD. But I couln't find that Library anywhere. Strangely, for the last three months, I did not know there were three Libraries, only two. The one iPhoto created as the third one worked perfectly when I would start up iPhoto. But now it is gone. Not even DiskWarrior can find it.