Champion Grapes, 19th C. Watercolor Theorem with Printed Text duck decoy there is no mark except

there is no mark except a "9" or a 6" on it

done by manipulating a sooty candle over the surface of a newly painted object

and what first came to my mind when I saw it was Willa Cather's My Antonia

Theorem painting

or to appear

Champion Grapes, 19th C. Watercolor Theorem with Printed Text duck decoy there is no mark exceptA lush looking bunch of grapes if I ever saw one. This is one of three later 19th c. theorem style watercolors of fruit I've just listed, found together in New Hampshire. I've bought and sold a number of watercolors of specific fruit specimens done in this manner looking almost like airbrush paintings (and indeed these were likely done by blowing the color with a glass straw, then hand painting the details.) With printed text identifying the specimens