| Robertson, Porter C.; 1899 Red Book; 1899 | 1899 Red Book | 1899-00-00 | PILGRIM | Chief Engineer |
| Robertson, Porter C.; 1900 Red Book; 1900 | 1900 Red Book | 1900-00-00 | PILGRIM | Chief Engineer |
| Robertson, Porter C.; 1901 Red Book; 1901 | 1901 Red Book | 1901-00-00 | PILGRIM | Chief Engineer |
| Robertson, Porter C.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | MARS | Chief Engineer |
| Robertson, Porter C.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | MARS | Chief Engineer |
| Robertson, Porter C.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | MARS | Chief Engineer |
| Robertson, Porter C.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | MARS | Chief Engineer |
| Robertson, Porter C.; 1912 Red Book; 1912 | 1912 Red Book | 1912-00-00 | MARS | Chief Engineer |