A camera representation is missing from my scene. How can I see it? I will be teaching a Blender class in January and I have downloaded the latest version of Blender.  I am going through the BlenderBasics_4thEdition2011.pdf that I've chosen to use as a text.  I'm creating a text file that is a record of my progress through that book.  Now I've gotten to the camera setup procedure and I can not see a representation of a camera in my scene, so I expanded the transform menu, exposing an auxiliary panel.  Atop this panel is a Scene Tree diagram that shows all of the elements in the scene.  I found that you could right-click on the Camera listed there and choose the Select option that appears atop the choices.  Then with the Camera selected first, I could hold down Shift and RMB on the Empty.  The text says that both objects will be highlighted - though I can't verify that because I cannot see the camera.  I did press Ctrl+T to add a "Track To Constraint" but the next thing the book says to do is move the camera and I can't see it to move it.

To get around the problem I started a new file and was able to move the camera that came with the standard scene.  Is there a way to show the Camera Icon that I am not aware of?



Alt+H, Thanks very much!
This is a very common issue for newer Blender users. There are many hotkeys that they are not aware of, and because of that may unwittingly do something not intended. 
This is a prime example of that. You appear to have accidentally pressed H while your camera was selected. This keystroke is the Blender shortcut to hide objects in the viewport. To make all objects in the scene visible again, press Alt+H. This un-hides all objects in the current viewport.