54 



Processes and Schools of Engraving. 



finds more recent impressions from copper-plates on satin or silk. But in 

 general, impressions are pulled on paper (or, less frequently, on vellum), 

 and some familiarity with the various qualities of paper is in consequence 

 of value in judging the age of an impression. 



Blocks and plates are often printed from centuries after their pro- 

 duction. The comparative quality of the vs^ork itself ought to help one 

 to detect later reprints, but paper known, from its watermark or other- 

 wise, to have been used at a particular epoch is often a considerable aid. 

 But here, as in many other points referred to in this Guide, words can 

 be of little use. The amateur, who possesses an eye for quality, will 

 train his judgment best by experience and constant comparison of 

 impressions. 



BOARD ROOM 



