| Welsh, T. H.; 1902 Red Book; 1902 | 1902 Red Book | 1902-00-00 | SONORA | Chief Engineer |
| Welsh, T. H.; 1903 Red Book; 1903 | 1903 Red Book | 1903-00-00 | SONORA | Chief Engineer |
| Welsh, T. H.; 1904 Red Book; 1904 | 1904 Red Book | 1904-00-00 | SONOMA | Chief Engineer |
| Welsh, T. H.; 1905 Red Book; 1905 | 1905 Red Book | 1905-00-00 | SYLVANIA | Chief Engineer |
| Welsh, T. H.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | SOCAPA | Chief Engineer |
| Welsh, T. H.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | SOCAPA | Chief Engineer |
| Welsh, T. H.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | SOCAPA | Chief Engineer |
| Welsh, T. H.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | FRED G. HARTWELL | Chief Engineer |