Definition of "chapman"

Done. They are gone: the sum is here in bank, my Face. I would we knew another chapman now would buy 'em outright.

c. 1610, Ben Jonson, The Alchemist, act 3

When chapmen billies leave the street, / And drouthy neibors, neibors meet, / As market days are wearing late, / An' folk begin to tak the gate

1790, Robert Burns, Tam o' Shanter‎