Naval sketch map of Plymouth 1792 Naval – Plymouth fine ms sketch map of Plymouth docks entitled ‘Sketch from memory of Plymouth and Dock by Liet Col J G Stedman 1792. Executed in watercolours and pen, including a non-existent island at the entrance to Plymouth sound marked ‘a mistake no land at all’. On a leaf of paper approx 26x20cm. Together with detailed research notes on Stedman and his drawings. John Gabriel Stedman (1744-97), soldier and author is best known for his book ‘Narrative of a five years expedition against the revolted negroes of Surinam’ (1796).