| Thorn, Walter G.; 1900 Red Book; 1900 | 1900 Red Book | 1900-00-00 | GERMANIC | Chief Engineer |
| Thorn, Walter G.; 1901 Red Book; 1901 | 1901 Red Book | 1901-00-00 | CITY OF GLASGOW | Chief Engineer |
| Thorn, Walter G.; 1902 Red Book; 1902 | 1902 Red Book | 1902-00-00 | CITY OF GLASGOW | Chief Engineer |
| Thorn, Walter G.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | MARTIN MULLEN | Chief Engineer |
| Thorn, Walter G.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | JOSEPH G. BUTLER JR. | Chief Engineer |
| Thorn, Walter G.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | JOSEPH G. BUTLER JR. | Chief Engineer |
| Thorn, Walter G.; 1909 Red Book; 1909 | 1909 Red Book | 1909-00-00 | JOSEPH G. BUTLER JR. | Chief Engineer |
| Thorn, Walter G.; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1926 Red Book | 1926 Red Book | | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | RENOWN | Chief Engineer |
| Thorn, Walter G.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | BEAUMONT PARKS | Chief Engineer |
| Thorn, Walter G.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | BEAUMONT PARKS | Chief Engineer |
| Thorn, Walter G.; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | BEAUMONT PARKS | Chief Engineer |
| Thorn, Walter G.; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | ROBERT W. STEWART | Chief Engineer |
| Thorn, Walter G.; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | ROBERT W. STEWART | Chief Engineer |
| Thorn, Walter G.; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | ROBERT W. STEWART | Chief Engineer |
| Thorn, Walter G.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | ROBERT W. STEWART | Chief Engineer |