In 1930–31 Riley joined the British Arctic Air Route Expedition as a meteorologist. This expedition consisted in a team of fourteen men led by Watkins with the mission to survey and monitor weather conditions in the little explored east coast of Greenland. Barely a year later Riley returned to Greenland with the smaller 1932-33 East Greenland Expedition, led by Watkins as well. He was one of the only three remaining team members following Watkin's untimely death at Tuttilik Fjord.
Riley next joined the 1934-1937 British Graham Land Expedition led by his former Greenland team mate John Rymill. In 1938 Riley joined the Royal Naval Volunteer Reserve and became active in Norway and Iceland —among other places— during World War II.
Riley died in a road accident on Christmas Day 1980 while he was living in retirement Essex.
- Riley, Jonathan P. (1989). From pole to pole, the life of Quentin Riley 1905-1980. Bluntisham: Bluntisham Books.
- Ridgway, John (1974). Gino Watkins. Oxford University Press. ISBN 978-0-19-273136-4.
- Courtauld, Simon, The Watkins Boys, London, Michael Russell, 2010. ISBN 9780859553186.
- Scott, J.M., The Land That God Gave Cain, London, Chatto and Windus, 1933.
- Quintin Riley obituary - Cambridge Journals
- Glasby, Geoff. "Geological Society – Skaergaard, Everest and more...". www.geolsoc.org.uk. Retrieved 4 March 2008.
- East Greenland Expedition (Pan Am) 1932 -33
- "Mr Watkins' Expedition to East Greenland, 1932–33". Polar Record. Cambridge University Press. 1 (No. 5): 28–30. 1933. doi:10.1017/S0032247400030138. Retrieved 26 July 2016.
- Quintin Theodore Petroc Molesworth Riley; Biographical notes
- Essex Chronicle - Quintin relished adventuring but he found 'normal' home life difficult
- Archives - Riley, British Arctic Air Route Expedition