| Leask, Alfred; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | STE. MARIE | Chief Engineer |
| Leask, Alfred; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | MICHIGAN CENTRAL | Captain |
| Leask, Alfred; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | DE TOUR | Captain |
| Leask, Alfred; 1926 Red Book | 1926 Red Book | | DE TOUR | Captain |
| Leask, Alfred; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | DE TOUR | Captain |
| Leask, Alfred; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | DE TOUR | Captain |
| Leask, Alfred; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | CHAMPION | Captain |
| Leask, Alfred; Great Lakes News 1/44; 1944 | Great Lakes News 1/44 | 1944-00-00 | T. F. NEWMAN | Chief Engineer |
| Leask, Alfred; Great Lakes News 1/44; 1944 | Great Lakes News 1/44 | 1944-00-00 | T. F. NEWMAN | diver |