94 Description of a Skreen for protecting Wall Trees.. 



The lower ends of the poles are advantageously retained 

 in their place, by means of a small iron spring key attached 

 to the coupling by a short chain. 



I am, dear Sir, 



very faithfully yours, 



Robert Holden. 



Darley Abbey, near Derby, 

 March 1st, 1819. 



The annexed sketch of two Skreens, one rolled up, and 

 the other extended, will make the above account sufficiently 

 intelligible. 



