The book, first published in 1862, is a telling of Borrow's (mostly) walking tour of Wales, in 1854. He starts off in the north and covers much of the country, inexplicably missing out most of Carmarthenshire and all of Pembrokeshire as well as Cardiff.
I won't give a full review, but it is an interesting look at Wales, right at the beginning of its industrial boom. I particularly appreciate this passage, describing his arrival at Merthyr Tydfil at night, at a time when (I believe) my great-great-great-grandfather, Thomas Hughes, was living there:
Delightful.Turning round a corner at the top of a hill I saw blazes here and there, and what appeared to be a glowing mountain in the south-east. I went towards it down a descent which continued for a long, long way; so great was the light cast by the blazes and that wonderful glowing object, that I could distinctly see the little stones upon the road. After walking about half-an-hour, always going downwards, I saw a house on my left hand and heard a noise of water opposite to it. It was a pistyll. I went to it, drank greedily, and then hurried on. More and more blazes, and the glowing object looking more terrible than ever. It was now above me at some distance to the left, and I could see that it was an immense quantity of heated matter like lava, occupying the upper and middle parts of a hill, and descending here and there almost to the bottom in a zigzag and tortuous manner. Between me and the hill of the burning object lay a deep ravine. After a time I came to a house, against the door of which a man was leaning. “What is all that burning stuff above, my friend?”“Dross from the iron forges, sir!”I now perceived a valley below me full of lights, and descending reached houses and a tramway. I had blazes now all around me. I went through a filthy slough, over a bridge, and up a street, from which dirty lanes branched off on either side, passed throngs of savage-looking people talking clamorously, shrank from addressing any of them, and finally, undirected, found myself before the Castle Inn at Merthyr Tydvil.