[3] In the following year Lemon joined Watkins and Augustine Courtauld in a survey trip of the East Greenland seashore that explored as far north as the head of Kangerlussuaq Fjord.

Then the three of them traveled southwards along the little explored King Frederick VI Coast on a gruesome open boat journey of 600 nautical miles (1,111 km).

Braving harsh weather conditions, the three boats managed to go all the way south and round Cape Farewell, reaching finally Nanortalik on the western side.

Watkins, Courtauld and Percy Lemon had made the dangerous trip on two small whaleboats and a kayak, a reckless venture that they were very lucky to survive.

[4] Captain Lemon had become seriously ill after the arduous boat journey in Greenland and did not recover even after returning to England in the early fall of 1931.