Green’s Dictionary of Slang

a countryman, a peasant.

1703		Hell Upon Earth 5: Harry, a Country-Man.
1708		J. Hall Memoirs (1714) 12: Harry, a Countrey-man.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Harry. a Country fellow. Cant.
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1908		K. McGaffey Sorrows of a Show Girl Ch. i: Sitting at another table with a Harry who had led me to believe that I was his own little Star of Hope.
1956		N. Algren Walk on the Wild Side 191: The city was full of hatless Harrys seeking not so much love but vengeance for wrongs.
1959		W. Hall Long and the Short and the Tall Act I: It’s odds on they’re just a buckshee bunch of Harries like yourselves.