THE FRESH-WATER LOCHS OF SCOTLAND. 
365 
feet in height, separate it from the valley in which lies Lochan na 
h-Earba. Loch Laggan drains directly an area of 34 square miles, but 
since it receives the overflow from Loch Pattack and Lochan na 
h-Earba, its total drainage area is nearly 62 square miles. The 
principal stream entering the loch is the river Pattack, which drains 
Loch Pattack and a number of smaller lochs. The Allt Lowrag brings 
EIG. 54. LOCH LAGGAN. 
(Photograph by Sir John Murray.) 
the overflow of Lochan na h-Earba. Near Aberarder, in the middle of 
the north shore, two large burns enter, and there are many smaller 
streams on this side. The river Spean issues from the loch, and flows 
into the Lochy close to Loch Lochy. 
Contours are drawn for every 25 feet of depth. The bottom is so 
irregular that only the 25-feet and the 50-feet contours are continuous, 
and follow approximately the outline of the shore. All the others are 
much broken up. The 7 5 -feet contour is broken into four distinct 
