| Surname | Jackson |
| First Name(s) | Welby Brown |
| Date of Rank as Writer Writer | 1821, April 30 |
| Execution of Covenant | 1821, June 30 |
| Notification of Appointment from the Honourable Court of Directors | 1821, Aug 1 |
| Arrived in India | 1822, Jan 17 |
| Date 5 | 1822, Oct 10: Assistant to the Register of the Sudder Dewanny and Nizamut Adawlut. |
| Date 6 | 1823, Mar 6: Acting Register and Assistant to the Magistrate of Bhaugulpore. |
| Date 7 | 1823, Sept 25: Officiating Magistrate of Bhaugulpore. |
| Date 8 | 1824, April 31: Officiating Collector of Bhaugulpore. |
| Date 9 | 1824, May 20: Officiating Collector of Bhaugulpore. |
| Date 10 | 1824, July 1: Second Register of Bhaugulpore. |
| Date 11 | 1824, Oct 21: Officiating Magistrate of Bhaugulpore. |
| Date 12 | 1824, Nov 18: Acting Judge and Magistrate of Purnea. |
| Date 13 | 1825, July 28: Acting Joint-Magistrate of Monghyr. |
| Date 14 | 1825, Sept 22: Invested with the Powers described in Sections 9 and 12, Regulation XXIV of 1814, and Sections 11 and 12, Regulation II of 1821. |
| Date 15 | 1825, Oct 6: Officiating Magistrate of Bhaugulpore. |
| Date 16 | 1826, Mar 2: Officiating Judge and Magistrate of Moorshedabad. |
| Date 17 | 1826, April 21: Second Assistant to the Register of the Sudder Dewanny and Nizamut Adawlut, and Officiating Judge and Magistrate of the Moorshdeabad City Court. |
| Date 18 | 1826, Aug 17: Second Register of the Civil Court at, and Assistant to the Magistrate of, Bareilly. |
| Date 19 | 1826, Oct 23: Acting Judge and Magistrate of Behar. |
| Date 20 | 1829, June 30: Magistrate of Behar. |
| Date 21 | 1831, Dec 13: Register of the Sudder Dewanny and Nizamut Adawlut at Allahabad. |
| Date 22 | 1835, May 21: Officiating Additional Judge of Ghazeepore. |
| Date 23 | 1836 Feb 15: Officiating Civil and Sessions Judge of Juanpore. |
| Date 24 | 1836, Feb 24: Officiating Additional Judge of Ghazeepore. |
| Date 25 | 1836, July 25: Officiating Judge of Benares. |
| Date 26 | 1837, April 10: Officiating Judge of Goruckpore. |
| Date 27 | 1837, April 14: Judge of Goruckpore. |
| Date 28 | 1838, Feb 13: Commissioner of Revenue and Circuit, Moorshedabad Division. |