| RefNo | RSL/3/15 | 
| Level | Item | 
| Title | Letter from John Churchman, Philadelphia, to Sir Joseph Banks | 
| Date | 1 October 1788 | 
| Description | On the Longitude problem.  Including copy of  'The Independent Gazateer' newspaper, printed in Philadelphia. | 
| Extent | 8 sides | 
| Format | Manuscript and printed documents | 
| AccessStatus | Open | 
| AccessConditions | No photocopying |