|Competitor for Great Britain|
|Competitor for England|
|British Empire Games|
|Silver||1930 Hamilton||6 miles|
In the 1924 Paris Olympic Games he finished fifth in the 10000 metre contest and fourth in the individual cross country event. He was the only British finisher in this race therefore the British team was unplaced in the team cross country competition. Just fifteen of the thirty-eight starters finished the event due to the extreme heat, The Times reporting the scenes at the end of the race:
Some way behind Harper a figure in the scarlet drawers of Spain appeared in the entrance, turned the wrong way, was stopped, and then ran horribly round in little circles till he plunged on his face. Immediately another figure appeared, Sewell of the British team. He also tried to run the wrong way, was checked, and turned round, ran giddily a few yards, staggered, met another competitor, a Finn, also reeling, and the two fell together in a dreadful heap. Meanwhile a Frenchman had entered and ran three-quarters of the distance to the winning line, began to zig-zag, threw up his arms helplessly, and crashed full length on the ground. It was all heartbreaking to watch. Never, surely, in any race – not even in a Grand National – was there anything like the proportion of casualties; and the race ought never to have been run in the heat of such a day. It was altogether a terrible race. Harper’s performance was a fine one.
Four years later at Amsterdam Harper finished 22nd in the 1928 Olympic marathon.
His final Olympic appearance was at Berlin in 1936 when he won the silver medal in the marathon. In this race Harper earned praise for advising eventual winner Sohn Kee-chung not to chase after Juan Carlos Zabala, who had opened a big lead. Zabala eventually pulled out of the race. Sohn was later reported to have said: "Please say Mr Harper is a very fine man for telling me about Zabala."
At the 1930 Empire Games he won the silver medal in the six miles event.
Harper ran for Hallamshire Harriers and Athletic Club in Sheffield, for whom he was a tremendously consistent cross-country runner. His record in the National cross-country championships was:
- 1923 - 3rd
- 1924 - 2nd
- 1925 - 2nd
- 1926 - 2nd
- 1927 - 1st
- 1928 - 14th
- 1929 - 1st
- 1930 - 2nd
In addition he won numerous Yorkshire and Northern cross-country titles and represented England in international cross-country competition nine times. He won this event in Belgium in 1926.
Harper had a fine reputation for sportsmanship. As well as the 1936 marathon incident mentioned above, in a 1924 international cross-country race he waited for another competitor, as described in The Times:
[The collapse of Ryan], besides causing much excitement, left Harper with every prospect of coming in first. Instead of making the most of his opportunity, however, Harper turned and waved for Cotterell to come along. Cotterell came up with a bound, and the pair ran abreast until about twenty-five yards from the tape, when Cotterell made a great sprint, leaving Harper apparently standing still, and won a sensational race. Cotterell must have put in some wonderful running in the last two-and-a-half miles to make up the ground he did. Without in the least trying to discount the excellence of his victory, however, every credit must be given to Harper, a young runner who, to say the least of it, displayed great unselfishness. There is no means of knowing exactly how much [Cotterell] had in reserve at the finish, but it certainly seemed that Harper deliberately sacrificed his chance of being the first man home.
Apocryphal stories tell of him helping up competitors who had fallen, and re-directing someone who had taken a wrong turn on a cross-country course. More prosaically, he was once said to have vacated his seat on a full bus to allow another passenger to sit, instead running behind the vehicle all the way up the steep hill to his home.