External Links
- History and photos
- “The Penrhyn Slate Quarry,” in Saturday Magazine, No. 12, September 8th, 1832, pp. 93.
- The Penrhyn Slate Quarries in North Wales circa 1858, in The Illustrated London News, Vol. XXXII, No. 913, Saturday, April 17, 1858, pp. 392-393.
Read more about this topic: Penrhyn Quarry
Famous quotes containing the words external and/or links:
“The soul, he said, is composed
Of the external world.”
—Wallace Stevens (1879–1955)
“An alliance is like a chain. It is not made stronger by adding weak links to it. A great power like the United States gains no advantage and it loses prestige by offering, indeed peddling, its alliances to all and sundry. An alliance should be hard diplomatic currency, valuable and hard to get, and not inflationary paper from the mimeograph machine in the State Department.”
—Walter Lippmann (1889–1974)