| Gregory, Charles M.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | FALCON | Chief Engineer |
| Gregory, Charles M.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | FALCON | Chief Engineer |
| Gregory, Charles M.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | PONTIAC | Chief Engineer |
| Gregory, Charles M.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | CENTURION | Chief Engineer |
| Gregory, Charles M.; 1911 Red Book; 1911 | 1911 Red Book | 1911-00-00 | ANGELINE | Chief Engineer |
| Gregory, Charles M.; 1912 Red Book; 1912 | 1912 Red Book | 1912-00-00 | ANGELINE | Chief Engineer |
| Gregory, Charles M.; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | JAMES S. DUNHAM | Chief Engineer |
| Gregory, Charles M.; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | JAMES S. DUNHAM | Chief Engineer |
| Gregory, Charles M.; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | ORINOCO | Chief Engineer |
| Gregory, Charles M.; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | PANAY | Chief Engineer |
| Gregory, Charles M.; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | PANAY | Chief Engineer |
| Gregory, Charles M.; 1926 Red Book | 1926 Red Book | | PANAY | Chief Engineer |
| Gregory, Charles M.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | COLONEL | Chief Engineer |
| Gregory, Charles M.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | COLONEL | Chief Engineer |
| Gregory, Charles M.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | COLONEL | Chief Engineer |
| Gregory, Charles M.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | COLONEL | Chief Engineer |
| Gregory, Charles M.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | MARQUETTE | Chief Engineer |
| Gregory, Charles M.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | MARQUETTE | Chief Engineer |
| Gregory, Charles M.; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | MARQUETTE | Chief Engineer |