106 ANNIVERSARY ADDRESS 



Mr D. Milne Home, Transactions of R.S.E, 1876, but 

 not explained by him. 



Again a surmise may be permitted, and glacial influ- 

 ence here, too, brought in. As the Tweed 

 Grounds of glacier may have dammed the Till, so may 

 Conjecture, an Akeld Dean glacier, coming right across 

 the valley to the high ground of Akeld 

 Steads opposite, have dammed the Glen till a lake was 

 formed, surface 170 to 180 feet above sea-level, and the 

 Glen would then find its overflow at the point just 

 mentioned near Coupland. There are some independent 

 evidences of Lake Ewart which may be given. The 

 existence of beds of clay, when not of glacial origin, that 

 is, not intermixed with gravel and boulders, but pure, 

 deep, and continuous, points to deposition in still lake 

 water of the finer sediment brought down by rivers. 

 The Ewart Tile Sheds and the Flodden Tile Sheds both 

 supply this evidence. Mr David Milne Home, before 

 quoted, says (p. 529) — " On Ewart estate, the proprietor. 

 Sir Horace St. Paul, informs me that the following 

 borings were made by him : — On the low haugh land 

 opposite to ITumbledon buildings, where the clay is at 

 the surface, he bored down 70 feet, and did not get 

 through it. He went through a few thin seams of 

 gravel. At another place, in boring for water, he went 

 first through 2.5 feet of dry gravel and sand ; at that 

 point, having reached the level of the river Glen not far 

 off*, he went through more gravel and sand, heavily 

 charged with water, for about 20 feet ; a thick bed of 

 clay was then reached. This clay bed was bored to a 

 depth of 100 feet, when the rods broke. There was 

 nothing in the clay but a few thin seams of gravel." 

 And, talking of excavations, I have brought hither with 

 me the result of some which were made recently in 

 digging a new channel for the river Glen near Ewart 

 Newtown. My factor came upon them buried, at a 

 depth of nine feet from the surface, in the rjyer 



