I have copies of both Baughan books.
The C&H volume (1972) covers "the mainline up to 1880" and barely mentions branches, not even Llandudno.
It's mostly about the construction phase, the eventual takeover by the LNWR and development of the ferry service to Dublin.
The North & Mid Wales volume is a quick survey of how the region's railways began, with some overlap with the C&H volume.
There are chapters on groups of lines, and all the branches seem to be covered, including prospective lines never built.
Certainly it covers basic information on the Clwyd and Caernarvonshire lines, routes to Blaenau Ffestiniog and on Anglesey.
The southern border of the book is the Hereford-Brecon line of the Midland and on to Neath, and there's plenty on the Cambrian and Central Wales lines.
One of the features is the prominence of railway contractor Thomas Savin, who built many of these lines in the 1860s for various railway companies.
The original book is dated 1980, with a revision dated 1991.
I think both books are rather short on railway operations (services, timetables etc), concentrating rather on construction, mergers and (in the case of the C&H book) rolling stock.
There's almost nothing on operation in the 20th century, until the run-down under BR started.
