| Firby, Harry; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | COLUMBIA | Chief Engineer |
| Firby, Harry; 1926 Red Book | 1926 Red Book | | COLUMBIA | Chief Engineer |