Four decades after Darwin's 1839 paper and shortly before his death, in a letter to Joseph Prestwich, he said that he gave up his Glen Roy theory when he read T. F. Jamieson's (1863) paper but he agreed with Prestwich's criticism of Jamieson's interpretation of the Glen Turret delta.
Forty years after Darwin published his 1839 work, and before his death, he abandoned his Glen Roy theory after reading T. F. Jamieson's (1863) paper but agreed with Prestwich's critique of Jamieson's interpretation of the Glen Turret delta.