Plot 303a is part of the following land areas:
| Tuesday 6 June 1514 | Earls Colne Manor Court Rolls | 60800512 |
| Tuesday 29 May 1515 | Earls Colne Manor Court Rolls | 60900139 |
| 1533 | Earls Colne Rental | 44000101 44000182 |
| Tuesday 22 May 1548 | Earls Colne Manor Court Rolls | 64200209 |
| Tuesday 11 June 1549 | Earls Colne Manor Court Rolls | 64300669 |
| Friday 1 November 1549 | Earls Colne Rental | 44100897 |
| Tuesday 27 May 1550 | Earls Colne Manor Court Rolls | 64400494 |
| Tuesday 15 May 1554 | Earls Colne Manor Court Rolls | 64800611 |
| Tuesday 26 May 1556 | Earls Colne Manor Court Rolls | 65000621 |
| Thursday 2 April 1562 | Earls Colne Rental | 44200728 |
| Wednesday 8 August 1576 | Earls Colne Manor Court Rolls | 66000480 |
| Friday 23 December 1584 | Earls Colne Rental | 44300782 |
| Friday 21 July 1587 | Earls Colne Manor Court Rolls | 66600007 |
| Thursday 18 September 1589 | Earls Colne Rental | 44402123 |
| 1598 | Terrier to accompany Map of Earls Colne and Colne Priory Manors | 44600896 |
| Monday 18 July 1608 | Wills | 3400607 |
| Friday 7 October 1608 | Earls Colne Manor Court Rolls | 37501323 |
| Friday 2 October 1612 | Colne Priory extracts | 23500056 |
| Friday 29 April 1614 | Colne Priory Manor Court Rolls | 33500255 |
| March 1615 | Earls Colne and Colne Priory rental | 22201774 |
| January 1630 | Earls Colne and Colne Priory rental | 22300615 22302166 |
| Wednesday 20 April 1636 | Earls Colne Manor Court Rolls | 38501829 |
| September 1638 | Earls Colne and Colne Priory rental | 22400103 22400112 |
| Thursday 30 December 1651 | Earls Colne Manor Court Rolls | 39001694 |
| Wednesday 27 May 1668 | Chancery Depositions | 16900005 |
| Tuesday 19 March 1678 | Earls Colne and Colne Priory rental | 22500891 22501050 |
| Friday 7 September 1683 | Wills | 4900808 |
| Friday 22 November 1734 | Wills | 5900597 |
| 1735 | Earls Colne Manor: Fine Book | 24402796 |
| Friday 18 April 1735 | Earls Colne Manor Court Rolls | 42100983 |
| 1746 | Earls Colne Manor: Fine Book | 24403791 |
| Monday 12 May 1746 | Earls Colne Manor Court Rolls | 42700236 |
| 1838 | Earls Colne Tithe Award | 90000660 |
| 1854 | Rental of the Manors of Earls Colne and Colne Priory | 80000440 80001065 |