Antiochus: Keen variariations was too:
[Event "?"]
[Site "Cleveland,OH"]
[Date "1871.??.??"]
[White "Mackenzie,George"]
[Black "Smith,HD"]
[Round "1"]
[Result "1-0"]
[ECO "C26"]
1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Ng8 5. Nf3
Be7 6. Bc4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1
b5 10. Bxf7+ Kf8 11. Bd5 Ke8 12. Nxh4 Qxh4 13. Qf3
Nh6 14. Bxa8 Nc6 15. Bxc6 dxc6 16. d3 Nf5 17. Ne4
Rf8 18. Bg5 Ng3+ 19. Qxg3 Qh5 20. Rxf8+ Kxf8 21. Rf1+
Ke8 22. Qf4 1-0
[Event "?"]
[Site "?"]
[Date "1881.??.??"]
[White "Mackenzie"]
[Black "NN"]
[Round "?"]
[Result "1-0"]
[ECO "C26"]
1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Qe7 5. Qe2
Ng8 6. Nf3 d6 7. Nd5 Qd8 8. exd6+ Be6 9. Nxc7+
Kd7 10. Ne5+ Kc8 11. Nxe6 fxe6 12. Qc4+ Nc6 13. Qxc6+
bxc6 14. Ba6+ Kb8 15. Nxc6# 1-0
[Event "?"]
[Site "Chemnitz exh"]
[Date "1885.??.??"]
[White "Zukertort,J blind"]
[Black "Kastner"]
[Round "?"]
[Result "1-0"]
[ECO "C26"]
1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Qe7 5. Qe2
Ng8 6. Nf3 c6 7. d4 g5 8. Ne4 h6 9. Nd6+
Kd8 10. Qc4 Rh7 11. Bd3 b5 12. Qb3 Rg7 13. Bd2
a5 14. Qa3 a4 15. Qc5 Ra6 16. Ba5+ 1-0
[Event "?"]
[Site "Herning"]
[Date "1926.??.??"]
[White "Nielsen,Bjorn"]
[Black "Jensen,Moller"]
[Round "?"]
[Result "1-0"]
[ECO "C26"]
1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Ng8 5. Bc4
d6 6. Nf3 c6 7. exd6 Bxd6 8. O-O Ne7 9. Ng5
Nd5 10. Re1+ Kf8 11. Qh5 g6 12. Qh6+ Kg8 13. Nxd5
Bf8 14. Re8 1-0