[3] To date, he is the only Guyanese ever to compete in the Marathon at the Summer Olympic Games and one of the most prominent Indo-Caribbean long distance runners of his time.

[4] Prowell holds the Guyana National Track and Field Record in the Marathon with a personal best time of 2:39:11 set on 4 February 1968 in St. Georges, Grenada.

[7] Harry Prowell was born in La Bonne Intention (LBI) Estate, East Coast Demerara, Guyana to Indo-Guyanese parents.

Known to the locals for his notorious barefoot running style, he rose to prominence at St. Mary-Ye-Virgin Anglican School in Beterverwagting, Guyana.

Prowell, Moses Dwarika, George de Peana and Ralph Gomes would go on to dominate Caribbean long distance athletics for the next decade.

He placed 11th out of 14 runners in the Men's 6 mile event with a time of 31:24 on 6 August 1966 at the Independent Park in Kingston, Jamaica.

In 1967, Prowell qualified for the 1967 Pan American Games in Winnipeg, Manitoba, Canada and participated in the Men's 10,000 metres on July 29, 1967, placing 8th out of 13 runners in the Final.

[1] As Prowell was training for the 1968 Summer Olympics, he set his personal best record of 2:39:11 in a Marathon on 4 February 1968 at a track event in St. George's, Grenada.

Leading up to the Olympics he also won a gold medal in the Marathon at the 1968 Texaco Southern Games in San Fernando, Trinidad, followed by a gold medal in the 3000 m race at the annual Inter Estate Athletics Championships in Guyana Notable runners Boyo Changur placed second and Gladstone Hopkinson placing third.

After successfully running in the 3-mile, 6-mile and half-marathon with a time of 1 hour and 3 minutes in Trinidad, Prowell was flowing directly to Edinburgh, Scotland the very day to compete in the 1970 British Commonwealth Games in the Men's Marathon event.