CLICK HERE FOR KEY TO SOURCES
from French comestible or from late Latin comestibilis, from comest- var. of comēs- ppl. stem of comedĕre to eat up, devour, from com- altogether + edĕre to eat.
The adjective appears to have become obsolete in England before 1688; but it was reintroduced, in noun use, from French in 19th century.
From: The Repertory of Arts, Manufactures, and Agriculture.
Consisting of Original Communications, .....
And Notices of all Patents Granted for Inventions.
Vol. XIII - Second Series, 1808