THE FRESH- WATER LOCHS OF SCOTLAND. 373 



from an area of over a square mile, by small burns only, and flows out 

 by the Water of Kiachnish into Loch Linnhe. 



At the date when surveyed (May 9, 1903) the height above sea-level 

 was 510*1 feet, exactly one foot lower than the elevation determined 

 by the Ordnance Survey officers in May 1867. 



The basin of Lochan Lunn da-Bhra is broken by islands, about a 

 quarter of a mile from each end and nearly in the middle of the loch. 

 The island towards the upper end is on a bar, the greatest depth to the 

 north-west and south-east of it being respectively 9 and 8 feet. This 

 bar cuts off a separate small basin, with a maximum depth of 21 feet. 

 The greatest depth of the loch, 25 feet, was found not far to the north- 

 east of this island. North-east from the lower island it is everywhere 

 shallow, nowhere exceeding 7 feet. 



The shores of Lochan Lunn da-Bhra are composed chiefly of gravel 

 with boulders, which form many heather-covered mounds. Rock is 

 exposed in many small spots. The stream flows out through a flattish 

 tract, covered with moraine mounds, about half a mile long, and rock 

 was seen in the channel at a distance of about 100 feet from the 

 loch. The promontory below Lundavra farm has been laid down by 

 the stream. 



We were told by the local inhabitants that the loch will sometimes 

 freeze all over in a single night, and that small dark trout are abundant 

 in it. There are also some pink-coloured trout, and others silvery like 

 salmon. 



The temperature was 48'0 Fahr. throughout. 



Loch nan Gabhar (see Plate XC.). Loch nan Gabhar (or Gour) is 

 a little weedy hollow lying close to the sea-shore, and very little above 

 sea-level, on the west side of Loch Linnhe, nearly opposite Ballachulish. 

 It runs nearly east and west, and occupies the southern portion of a 

 large oval alluvial flat, in the midst of which rises an abrupt boss of 

 rock, the Torr an Duin, apparently some 70 or 80 feet in height. This 

 alluvial flat is surrounded by steep rocky .hills, which form the southern 

 shore of the loch. 



The loch is of very irregular form, and interrupted by narrows, 

 bays, and promontories. It is fully half a mile long, one-sixth of a mile 

 in greatest breadth, and one-eighth of a mile in mean breadth. The 

 maximum depth is 5 feet, and the mean depth 2| feet. The area of the 

 water surface is only about 45 acres, and it receives the drainage of 

 13 square miles of country. The height above sea-level, on the date 

 when the survey was made (May 12, 1903), was 7*35 feet, as compared 

 with 7'5 feet observed by the officers of the Ordnance Survey on 

 July 19, 1867. 



Loch nan Gabhar receives by the river Gour the drainage of a 

 considerable mountainous stretch of country, bordering Glen Gour, 



