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50 yards wide, and the gully from A to C is near a 
quarter of a meafured mile long. 
The brook B, being flopped up by the mofs at E, 
has now formed a lake at D. 
About 400 acres of the^ow, next the place of its 
evacuation, appear to have funk from 5 to 25 feet : 
and this fubfidence has occafioned great fiffures upon 
thofe parts of the mofs which refufed to fink, Thefe 
fiffures are from 4 to 8 feet wide, and as much in 
depth. The lurface of the flow, confifting of heath 
and coarfe grafs, was torn away in large pieces, 
which ftill lie upon the furface of the new mofs, 
fome of them from 20 to 50 feet long. But the 
greater part of the furface of the flow remained, and 
only fubflded ; the mofs, rendered thin by the flood, 
running away from under it. 
Looking over the Solway mofs, at the village of 
Longtown, where there is a bridge on the Efk, they 
formerly faw only the tops of the trees at Gratney, a 
houfe of the Marquis of Annandale’s, 4 miles diffcant ; 
but now they fee them almoft to the ground. And 
looking over it, in another direction, they now fee 
two farm-towns of Sir William Maxwel’s, which 
were not before vifible. So' that the ridge of the 
flow or mofs feems to have fubflded about 25 feet. 
I ever am, with the higheff refpedt. 
My Lord, 
Your Lordfhip’s moft obliged 
and devoted fervant, 
John Walker* 
XVI. A 
Moffat, 
Jan. 30, 1772* 
