Recently I was reading Dr. Tim Harding's Eminent Victorian Chess Players Ten Biographies (2012), and in its Appendix II "Games by Captain Evans" I found the following game. While its date is unknown, the fact that it was published in 1843 makes it one of the earliest examples of the opening that I have seen. It also features a creative fortress defense (R + N vs Q) in the endgame.
Wilson, Harry - Evans, William Davies
Unknown place and date
Notes by Harding and CPC.
From CPC [Chess Player's Chronicle], IV (1843) pages 293-295: "This and the following game are from a choice collection of unpublished MS. games in the possession of Mr. Harry Wilson, which that distinguished Amateur, with his accustomed liberality, has kindly placed at the disposal of the Editor." The games could have been played in Wales (if before 1840) or in London, or at
Wilson's home at Carisbrooke on the Isle of Wight.
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Nh6 6.Nxf7 Nxf7 7.Bxf7+ Kxf7 8.Qh5+ g6 9.Qxc5
9...Re8 10.Qd5+ Kg7 11.Bg5 Rxe4+ 12.Qxe4 Qxg5 13.O-O d5 14.Qf3 Ne7 15.Qg3 Qxg3 16.hxg3 Bf5 17.Rc1? c5 18.Nd2 c4 19.c3 d3 20.b3 Rc8 21.bxc4 dxc4 22.Rab1 Rc7 23.Rb4 Be6 24.Rcb1 b6 25.Re1 Rc6 26. Re4? a5 27.Rb5 Kf7 28.Rf4+? Kg7 29.Kf1 Nd5 30.Rxd5 Bxd5 31.Rd4 Rc5 32.f3 b5 33.a3 Kf6 34.Kf2 b4 35.axb4 axb4 36.cxb4 c3!
37.bxc5 c2 38.Rxd5 c1=Q 39.Rxd3 Qxc5+ 40.Ke2 Qg1 41.Ne4+ Ke5 42.Re3 Qxg2+ 43.Nf2+ Kd4 44.Re4+ Kd5 45.g4 h5 46.gxh5 gxh5 47.Rh4 Qg5 48.Rh3 Kd4 49.Kf1 Ke3 50.Nd1+ Kd2 51.Nf2 Qb5+ 52.Kg2 Ke1 53.Rh1+ Ke2 54.Nh3 Qf5 55.Ng1+ Ke3 56.Rh3 Qc2+ 57.Kh1 Qg6 58.Rh2 Qg5
59.Re2+ Kd3 60.Rh2 h4 61.Rg2 Qf5 62.Rh2 Qf4 63.Rh3 Kd2 64.Rh2+ Ke1 65.Ra2 Qd4 66.Re2+ Kf1 67.Rg2 Qd7 68.Ra2 Qg7 69.Nh3 Qf6 70.Rf2+ Ke1 71.Kg1 Qg6+ 72.Rg2 Qf5 73.Ng5 h3 74.Rg4 Qc5+ 75.Kh2 Qf2+ 76.Kxh3 Kf1 77.Rg3 Qb6 78.f4 Qf2??
An egregious blunder! The game should have been drawn 20 moves before.