Made his first–team debut on 8 November 1884 in a FA Cup first round tie against Notts Olympic, County won 2–0.
A prolific goal–scorer in Notts non–League years, with just six short of 100 goals in 123 recorded appearances, Harry Jackson was rightly dubbed "A goal–scoring wizard."
In FA Cup matches also his total of 19 exceeded by some margin Tommy Lawton' 13 in the same competition, but when Notts became a Football League club in 1888–89 his star was on the wane.
[2][3] Harry Jackson, playing as a winger, made his League debut on 22 September 1888 at Victoria Ground, the then home of Stoke.
Harry Jackson, playing at centre–forward, scored his League debut goal on 23 February 1889 at Dudley Road, the then home of Wolverhampton Wanderers.