A map of the district, with the parallel roads shown in red, is annexed. [Transcriber's note: Sorry! No red available to show the line on the map; you will have to deduce the course of the roads from the contours etc.]
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LITERATURE OF THE SUBJECT.
THOMAS PENNANT. — A Tour in Scotland. Vol. iii. 1776, p. 394. JOHN MACCULLOCH. — On the Parallel Roads of Glen Roy. Geol. Soc. Trans. vol. iv. 1817, p. 314.
THOMAS LAUDER DICK (afterwards SIR THOMAS DICK-LAUDER, Bart.) — On the Parallel Roads of Lochaber. Edin. Roy. Soc. Trans. 1818, vol. ix. p. 1.
CHARLES DARWIN. — Observations on the Parallel Roads of Glen Roy, and of the other parts of Lochaber in Scotland, with an attempt to prove that they are of marine origin. Phil. Trans. 1839, vol. cxxix. p. 39.
SIR CHARLES LYELL. — Elements of Geology. Second edition, 1841.
Louis AGASSIZ. — The Glacial Theory and its Recent Progress — Parallel Terraces. Edin. New Phil. Journal, 1842, vol. xxxiii. p. 236.
DAVID MILNE (afterwards DAVID MILNE-HOME). — On the Parallel Roads of Lochaber; with Remarks on the Change of Relative Levels of Sea and Land in Scotland, and on the Detrital Deposits in that Country. Edin. Roy. Soc. Trans. 1847, vol. xvi. p. 395.