Despite all the fun of computer artwork, there is no real equivalent for complex pen-&-inks. To have any reasonable idea of the original artwork, a gray-scale scan is called for, such as in the two below. The amusing aspect of this is that in nineteenth-century printing and even afterward, pen-&-inks (or its equivalent of crosshatched plate engravings) were used since tones (i.e., gray scales) were either not possible or quite expensive.   A vole.
	A wave.

 
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