Plot 18a is part of the following land areas:
| Tuesday 2 June 1528 | Earls Colne Manor Court Rolls | 62200631 |
| 1533 | Earls Colne Rental | 44000944 |
| Friday 1 November 1549 | Earls Colne Rental | 44100397 |
| Tuesday 7 June 1552 | Earls Colne Manor Court Rolls | 64600463 |
| Tuesday 8 June 1557 | Earls Colne Manor Court Rolls | 65100384 |
| Thursday 2 April 1562 | Earls Colne Rental | 44200295 |
| Monday 19 June 1570 | Earls Colne Manor Court Rolls | 65700468 |
| Monday 1 October 1571 | Earls Colne Manor Court Rolls | 65800550 |
| Friday 23 December 1584 | Earls Colne Rental | 44300479 |
| Tuesday 23 November 1585 | Wills | 2900786 |
| Tuesday 18 May 1619 | Earls Colne Manor Court Rolls | 37901317 |
| 1624 | Earls Colne Manor: Fine Book | 24001664 |
| Thursday 14 October 1624 | Earls Colne Manor Court Rolls | 38101665 |
| 1626 | Earls Colne Manor: Fine Book | 24001873 |
| Tuesday 30 May 1626 | Earls Colne Manor Court Rolls | 38201170 38201220 |
| 1631 | Earls Colne Manor: Fine Book | 24002395 |
| Wednesday 20 July 1631 | Earls Colne Manor Court Rolls | 38302466 |
| 1636 | Earls Colne Manor: Fine Book | 24003344 |
| Tuesday 3 January 1637 | Earls Colne Manor Court Rolls | 38502702 38503180 |
| September 1638 | Earls Colne and Colne Priory rental | 22401492 |
| 1644 | Earls Colne Manor: Fine Book | 24100270 |
| Wednesday 8 January 1645 | Earls Colne Manor Court Rolls | 38800960 |
| 1646 | Earls Colne Manor: Fine Book | 24100395 |
| Friday 28 May 1675 | Freehold Titles | 27400005 |
| Tuesday 27 June 1676 | Earls Colne Manor Court Rolls | 39800476 |
| Saturday 14 December 1676 | Earls Colne Manor Court Rolls | 39800521 |
| Tuesday 19 March 1678 | Earls Colne and Colne Priory rental | 22500756 |
| Tuesday 8 April 1712 | Colne Priory Manor Court Rolls | 36100817 |
| 1749 | Earls Colne Manor: Fine Book | 24404012 |
| Wednesday 15 November 1749 | Earls Colne Manor Court Rolls | 42800585 |
| Thursday 29 October 1795 | Wills | 93000455 |
| 1854 | Rental of the Manors of Earls Colne and Colne Priory | 80000805 |