This will be my repository for P&LE information and links.
P&LE entry in the April 1971 Official Railway Equipment Register: 304Kb PDF File
In October of 1967, Railway Signaling & Communications published
an article about the P&LE CTC installation. Click on the image to download
a 506Kb pdf file of the article. 
The article includes a diagram of the CTC map. Click here to download a 120Kb JPEG of the diagram.
I have been doing some research lately on the U28B and GP7 P&LE road power and comparisons with Stewart and P2K models respectively. Follow the links below for my current set of information and photos.
U28B comparison of prototype and models
GP7 comparison of prototype and models (not ready yet)
