624 D. MILNE HOME ON’'THE PARALLEL ROADS OF LOCHABER. 
I requested Sir Henry JAMES to authorise his surveyors to mark on the 
Ordnance Maps such of these lines as they could recognize as resembling the 
Parallel Roads. Accordingly, I observe that in the last edition of the Glen 
Spean six-inch scale map, one of these lines, 1306 feet above the sea, has been | 
represented on “Craig Dhu.” It runs continuously for more than half a mile. 
There is another on the east side of Glen Roy, opposite to the side valley 
called the ‘‘ Gap” and Ben Erin, at a height of above 1200 feet. 
CHAMBERS, in his book, specifies other lines at 1337 and 1495, which he says 
“are so bold, that I cannot but wonder at their not hitherto having attracted 
any special attention.” 
Mr Jotty, of Inverness, has within the last three years, not only verified 
these observations of CHAMBERS’, but has discovered on Ben Chlinaig lines of a 
similar character, exceeding 1700 feet above the sea. 
The height of the shelf represented by the Ordnance Surveyors, as occurring 
n “Craig Dhu,” at 1306 feet, does not agree with the heights given by RoBErt 
. CHAMBERS or by Mr Jo.tty for any corresponding line on Ben Chlinaig. There- 
fore, it cannot at present be assumed that these lines on the two sides of the 
valley, where opposite to one another, correspond in level. CHAMBERS’ chief 
reason for pronouncing them to be sea-beaches, has therefore not yet been 
verified. 
I may mention that there is also a line on Ben Erin (situated bene Glen 
Roy and Glen Gluoy), which my brother the Admiral, who accompanied Mr 
JoLLy and me on a visit three years ago, was the first to notice. This I judged 
to be about 1877 feet above the sea, when viewing it as I is repeatedly from 
Craig Dhu and Ben Chiinaig. 
With regard to the character and origin of the lines on Ben Chlinaig, Craig 
Dhu, and Ben Erin, now referred to, I am unable to give an opinion. They 
may have been formed by the sea as CHAMBERS supposed; but, whether they 
were beaches or submarine banks, is a question depending for its solution on 
further investigation. I regret that more of these anomalous lines, if examined 
by the Ordnance Surveyors, have not been represented on their maps. Their 
position on both sides of Glen Spean, and nearly opposite to one another, 
gives to them peculiar interest in reference to the way in which they could be 
formed, when the glen was a sea passage. 
One thing seems tolerably certain, that these lines are quite different in ~ 
character from the “ Parallel Roads.” On that point Messrs JAMIESON and 
JOLLY have expressed an opinion in which I quite concur, though I do not 
concur in considering them to be the moraines of glaciers.* 
* Since this paper was read, I have had an opportunity of walking along the line, shown on the 
6-inch Ordnance Map at a height of 1306 feet on Craig Dhu. It extends for about half a mile on the 
part of the valley above Achleureuch and Mullaggan. It certainly has none of the characters of a 
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