Routes covered:
A) Merthyr to Pontsticill Jnct, Hirwaun & Quaker's Yard (High Level).
B) Pontypool Road to Neath Jnct.
C) Pages & Pages of Technical Data - Engine Head Lamps & Bell Signals, Signal Box Openings, Maximum Speeds, Refuge Sidings & Loops, Engine Restrictions, Maximum Loads, Banking & Shunting Engine Hours etc.