PREFACE. 
xvii 
myfelf obliged publickly to acknowledge. When I had pradlifed a little while, I refolved 
to do fuch new and uncommon Birds, as I had in my Pojfefiion, Jince I faved Expences 
and only employed my ‘Time. 
In etching Plates which are afterwards to be coloured', I have difcovered, that they 
Jhould be done in a manner different from fuch things that are to continue Black and 
White-, therefore I am willing to publijh fuch Remarks on that Head, as may perhaps 
be of ufe to others that may hereafter publijh any thing of that kind. He who would 
make a Print after any coloured Drawing, Jloould make his Lights much lighter than 
they are in the Drawing, and the Shadows. rather darker, which will indeed give your 
Print a fomewhat Jhocking Degree of Light and Shadow; but when you confder that 
by colouring, your Lights will become darker, and your very black Shadows, by being 
wajhed with Colours, which generally are lighter than Black, will become fomething 
lighterin Prints for colouring, it will be convenient to leave pretty broad clean white 
Places that area little dark in your colour d Drawing : For Example, if a Part in your 
Drawing be of Blue or Red, or any fine Colour pretty deep if you make your Print of 
fo deep a Shade in thofe Parts, the Blacknefs will cafl through the tranfparent Colours 
which you rnuft ufe in wajhing Prints, and render them dead and dirty ; and if you lay 
an too great a Body of Colour, it will darken your Figure too much in the Lights, and 
make it flat and heavy. On the contrary, if you leave Lights as broad and as clean as the 
thing will permit, your Colours laid on Juch light Parts will appear with more Lufire 
than with black Strokes under them; and when the Print is wajhed with a little Judg¬ 
ment, it will lofe its too great Proportion of Light and Shadow, and become foft and 
agreeable, and deceive tolerable Judges fo far as to pafs J'or a Water-colour d Draw¬ 
ing. Prints that are not worked with a diredi Defign for colouring , cannot fo eafily be 
brought to that Beauty they mufi be labour'd and painted with body Colours to make 
them look tolerably. 
I do not purpofe to part with any of the Prints uncolour d while I live, left they 
Jhould be afterwards colour d by unskilful People, which might be a Blemijh to the Work, 
by being feen and taken for my Colourings. A Copy carefully and exadlly colour dfrom 
the original Drawings, will be depofited in the Library of the College of Phyficians, 
