Finding packed textures in a scene?

I was working on a scene a few months ago and packed one of the textures. Now I want to unpack the textures but I can’t remember which texture it was and this scene has a lot of objects? The thing is that none of the textures seem to be packed in the texture rollout or in the outliner’s datablock mode.

Is it possible for a texture to become orphaned and stuck in the blender file? There is definitely a packed texture somewhere because the file size is a lot bigger than earlier versions of the file.

If it’s an image texture, try accessing the image from the UV window. It would be there if it exists, I would think.