| Oldenburg, Henry; ISMA Directory; 1906 | ISMA Directory | 1906-00-00 | HURON | Captain |
| Oldenburg, Henry; ISMA Directory; 1907 | ISMA Directory | 1907-00-00 | HURON | Captain |
| Oldenburg, Henry; ISMA Directory; 1909 | ISMA Directory | 1909-00-00 | LANSDOWNE | Captain |
| Oldenburg, Henry; ISMA Directory; 1910 | ISMA Directory | 1910-00-00 | LANSDOWNE | Captain |
| Oldenburg, Henry; ISMA Directory; 1911 | ISMA Directory | 1911-00-00 | LANSDOWNE | Captain |
| Oldenburg, Henry; ISMA Directory; 1913 | ISMA Directory | 1913-00-00 | LANSDOWNE | Captain |
| Oldenburg, Henry; ISMA Directory; 1914 | ISMA Directory | 1914-00-00 | LANSDOWNE | Captain |