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Iv(Son,Slakeman & Company, Publishers, 
753 & 755 Broadway, JVewlarl'v. 
23rd October, 1089. 
Prof. Sereno Watson, 
Cambridge, Mass. 
Dear Sir: 
We are in receipt of your note of 19th inst requesting us 
not to do anything in the preparation of plates for the Manual 
from the coppers which you sent till v?e hear from you again. The 
copper plates were already in the hands of the engraver when your 
note was received and we thought it best to leave them there even 
though the plate resulting might have to be done over again^as 
this trial would enable us to determine the question as to whether 
the photo -eng ravers can make relief plates which will print sat- 
isfactorily for use in the Manual. This is a question that we 
are not absolutely certain about and so it will be an advantage 
for us to have this trial plate made although it may have to be 
replaced by another one later. The corrections which you sent 
on the 11th had already been made in the plate before it went to 
the photo -engraver. Whatever the result is it will be of ad- 
vantage for us to know at the earliest possible time whether we 
can depend upon relief printing for the plates, and as the time 
is getting closer and closer to the first of January we think it 
desirable to anticipate all these questions and have them out of 
the way before it becomes necessary to rush the book on to the 
press. 
Yours truly. 
