All records from Helmdon map
| Ref. | Title | X Coord | Y Coord |
|---|---|---|---|
| L1057 | Contractors' 0-6-0 saddletank locomotive, CICETER. | 458300 | 244000 |
| L1058 | Contractors' 0-6-0 saddletank locomotive, BRADFORD. | 458600 | 243900 |
| L1061 | Contractors' 0-6-0 saddletank locomotive, NEWCASTLE. | 458185 | 243955 |
| L1111 | Brick arch occupation bridge near Radstone, Northamptonshire. | 458980 | 241050 |
| L1112 | Brick arch occupation underbridge near Helmdon, Northamptonshire. | 458300 | 243800 |
| L1113 | Three arch overbridge near Helmdon, Northamptonshire. | 457800 | 244500 |
| L1115 | Steel girder underbridge near Radstone in Northamptonshire. | 458980 | 241050 |
| L1116 | Brick arch overbridge near Radstone in Northamptonshire | 459100 | 240700 |
| L1117 | Three arch brick overbridge near Helmdon, Northamptonshire. | 459100 | 240300 |
| L2766 | Helmdon viaduct, Northamptonshire | 458300 | 243600 |
| L3122 | Unidentified station under construction | 458600 | 243000 |
