BANKS OF THE TWEED AND SOME OF ITS TRIBUTARIES. 535 
(6.) Visible also north-east of Fireburn Mill Toll-bar, and running east- 
wards as far as Lees, first crossing the road near Coldstream. 
(7.) Faint traces west and east of Lennel Churchyard; also on bank opposite 
to the mouth of River Till. 
(8.) No line or bank at or about this level has been noticed till Tweedhill 
(in Hutton parish) is reached, where a great extent of flat land occurs, bounded 
by a line of bank on the south, near Tweedhill Lodge gate. 
(9.) The village of Paxton occupies a bank sloping to the south. An exten- 
sive piece of flat land, 126 feet above the river, lies between the village and 
the Tweed, and corresponding with a similar flat on the south side of the 
river. 
(10.) A steepish bank, running east-south-east, is seen at this level, on the 
east side of the River Whitadder, at Grangeburn Mill. 
(11.) There is a similar bank at Low Letham, about 2 miles from 
Berwick. 
It is hardly necessary to observe, that the lines of bank mentioned in 
the foregoing list are by no means distinct. If they were less obscure, 
their antiquity might be doubted. Of course, it requires some experience 
before they can be distinguished; but the contour lines of the Ordnance 
Survey afford great assistance. Indeed, it would be hardly possible to trace 
them or ascertain their height above the sea, without the aid of these contour 
lines. 
It will at once be perceived, that there are two important differences 
between the system of terraces last referred to and those first mentioned. 
Those specified in the Table on pages from page 517 to page 523, slope 
with the river ; whilst the others are horizontal, in an east and west direction. 
The first set cling to the river banks; the last set appear to have no connec- 
tion with the river. Looking at the spaces between the set of lines on the south 
side of the valley and the corresponding set on the north side, amounting in 
somes place to more than a mile, these last mentioned banks seem due to a lake 
or an arm of the sea, and not to the river. 
In regard to the terraces on the banks of the Tweed, which I have said 
slope down eastward, I make a reservation regarding those between Cold- 
stream Bridge and Wark. Iam not sure that they may not be horizontal; in 
which case, they could not have been formed by the river. The reasons for my 
uncertainty are these :—1st¢, The level of these terraces seems to be very nearly 
equidistant from the Ordnance horizontal contour lines at Wark and at Corn- 
hill. 2d, Between Cornhill House and Coldstream Bridge, the line of cliff makes 
a deep bay or loop, which is indicative more of lake than river. 3d, At two 
places on the north bank of the river (viz., above Lees and above Fireburn 
Mill), there are beds of small gravel, horizontally stratified, which seem 
