sentences:  In 1930 he was appointed Surveyor to the British Arctic Air Route Expedition to Greenland, led by Gino Watkins.Expedition members included John Rymill and Freddie Spencer Chapman but, as a seasoned Army officer, Lindsay brought a disciplined organisational and administrative experience to the team.Lindsay later wrote up his experiences in a book "Those Greenland Days" (1932), paying tribute to Watkins' team building.